@iammistahwolf Okay, I'm back in the game, luckily I have backup to do a quick downgrade in case of an unexpected update.
Anyway... The nasty "meat bug" still persists and prevents me from using "mpclothes". I mean, sadly my previous screenshot is still what's happening. 
Are you using a 'player character (michael, trevor, franklin) to 'MP freemode freemode female mod?'
No, I'm using the original customisable male and female player characters from Online!
No, the pants from the link you gave you said you're having trouble with.
That's an installation test, I have problems with "mpclothes" in general, not just with pants.
And for the last time, 'you don't have to uninstall CC to check if it's conflicting with MPC.' I just checked. CC has an .asi file. To temporarily disable it or any other script that has an .asi file, all you have to do is 'copy the .asi', put it on your desktop or in another file somewhere else, then delete 'just the .asi' from the game folder.
I can't do anything if I remove "character creation script" from the game, because I want the custom installed things on my already made character, which is basically made with "character creation script" and it is only available trough it, okay?
I'm installed those two files from the "lowr 48" folder as "000" (original was "002") and redid the filenames of all the other files as you wrote.
Uhh, Steam decided to I'm required to let it update GTA5, otherwise I cannot start it at all! 
I'll be back when Steam let me into the game again...
Note: you can have all the access to MPC clothes with Menyoo or other trainers, but you won't have the 'joy' of that whole store and paying for things experience. Oh yeah btw, are you using a player character to mpfemale mod?
Nope, "character creation script" allows me to enter a free outfit creation mode at every clothing store location via pressing Q at the entrance.
No, I'm not using any mods to alter any player characters, the male and female player characters are the original ones.
Yes, you'll need menyoo to do it.
Yes, I have Menyoo now as well, but I wasn't successful with it yet.
Lastly, this may sound obvious but did you convert the model and texture files to SP format? The pants mod comes with the 5M version and you need to delete everything before 'accs'.
Yes, this is two example file names from that pants:
Lastly, did you install the actual 'lowr' that came with the mod? Looks like you didn't.
What are you mean?? The download only contained the mpclothes folder which goes into dlcpacks location, nothing else.
Lastly, "character creation script" stores my customised male and female player characters, so, obviously, I don't want to even temporarily remove it from the game, okay?
Is that the pants model you installed?
Nope, I think it's some default pants with invalid texture. Also, currently I don't have any other clothes installed, just one pants for testing before I install more.
I moved this pants from "lowr" to "accs" and the result is:
I'm unable to find the installed pants anywhere, not even in Menyoo.
By the way, I'm trying to get working this first:
https://www.gta5-mods.com/player/pants-mp-female-938dd202-0dd3-45dc-ad6c-dae200657842
@iammistahwolf Okay, in Menyoo I'm only seeing this: 
This is in pants slot 156 where my first manually installed pants should be. Something still won't work, I'm clueless now about what should I do... š
@iammistahwolf The "character creation script" allows me to be able to use any clothing store and barber shop location in story mode, also, that mod stores my customised male and female characters with their outfits, so, obviously, I don't want to uninstall it. š
Okay, I installed Menyoo and modified the open key to F2, so, I'll test it and report back afterwards. š
@iammistahwolf So, you say if I not use Menyoo, "mpclothes" clothes basically won't work at all? My game shows the extra slots what "mpclothes" added, but that's all. I don't want to uninstall "Enhanced Native Trainer" and/or "TrainerV" just to install Menyoo.
So that means everytime 'R' updates the game, all your clothing slots will 'move to a higher number when you go to use them in a trainer.' That's important to know and I'll circle back to that.
I downgraded the game back after the last update and I'm trying to "freeze" the game version at my current working state.
Anyway, I have a pants (for test) wich have these files:
I switched on "edit mode" in OpenIV and installed these to:
mods/update/x64/dlcpacks/mpclothes/dlc.rpf/x64/models/cdimages/mpclothes_female.rpf
The game somehow cannot even see what I'm installed, and after one day, my "mpclothes" is empty again! What's going on?? 
...but if using Menyoo...
I'm using "Enhanced Native Trainer", "TrainerV" and "character creation script".
@JohnFromGWN That specific pants was an example, "mpclothes" not showing any installed clothes at all, just empty slots, no matter what I tried. So?
I have "mpclothes" DLC installed, but when I try to install anything, it won't show up at all! I tried following this video:
@Ultwa Open "OpenIV", then drag-and-drop the oiv onto its window, a new window should appear, which is the install window for the mod. It's totally unnecessary to try opening oiv files any other ways. 
@JohnFromGWN Can you guide me trough how can I install clothes with "mpclothes"? š I tried installing just a pants as a first test to understand how it works, but that model is nowhere to be found in-game. I want to install clothes for the customisable male and female player characters only, but absolutely no luck so far. ā¹
@iammistahwolf Okay, I'm re-enabled "mpclothes". Still no game crash, just I'm struggling to get clothes properly installed.
Are you using "mpclothes"? If yes, can you show me how you installed your clothes?
@iammistahwolf So, I'm eliminated every DLC from the list with "g9ec" in their name, except "patchday27g9ec" as you wrote. Well...
@JohnFromGWN Well, I redone most of my addons, too, and these are the results:
@JohnFromGWN I removed the "mpg9ec" DLC as you wrote and...
At first it seemed it worked, I was happy, but the game still crashed as before at another slot. š Ouch...
I'm also removed "mpclothes" addon, but it still crashes...
@JohnFromGWN So, if I remove that DLC, manually installed clothing items won't cause any more problems? š¤ That would be good...
@JohnFromGWN Can you summarise what was the solution there? What's that "'g9ec' crap" that user mentioning?
I want to install clothes mods (shirts, pants, ect.) for the customisable female and male player character, but every installed item just makes a random clothing slot instantly crash my game to desktop when I browse clothes in-game and the game tries to show the model on me.The only thing working is this Crocs mod, but nothing else from here.
Any help is appreciated.