@Burnt-Chicken-Nugget
To edit the gameconfig.xml you would use OpenIV to locate the file (it is located in mods/update/update.rpf/common/data ), toggle the Edit Mode in the right upper corner of OpenIV and rightclick the gameconfig.xml and choose edit.
Then you've just to search for those names I mentioned. Eg. MaxTotalPeds_Base
But if you are not that tech savvy you can try my gameconfig.xml which is based on this and has already the edits for addonpeds (custom dlcpack - not the one from meth0d's Add-On Ped script). You will need a new gameconfig.xml for every new patch released - keep that in mind!
Please make sure you have both of these installed:
Download: gameconfig.xml
Didn't ask but are you using meth0d's add-on ped script? If so you may think about switching to a custom dlcpack. If you should require further assistance don't hesitate to ask! For one that's not tech savvy it may seem daunting at first, but its really simple once you've wrapped your mind around it. Just keep trying
.