How can I install multiple textures for a ped?

Freaky20

Recently,
I Downloaded a custom ped from my GTA V,
"Sims4 Custom ped addon"

This pack has two character

Lana
Sam

Now,
I saw a lot of new cloths for these peds,
I downloaded all because all were amazing. Now, I don't know how to install these cloth pack? I downloaded 6 files 3 for lana and 3 for sam. now on each file there is 2-3 files with extension .ytd, .ydd etc. Also in each file has some jpg too.

I completely jumbled because I don't how to install them. There is no proper instruction by the author aslo no video on youtube for this.

If anyone know then please reply ASAP.