In my WaW map I'm trying to add perks from other games, and I have already tried installing Harry's perks but I guess I didn't do it right cause there were lots of errors about perk bottles being missing and something about pack a punch files. Please help?

More people ask the same question.

https://www.ugx-mods.com/forum/modding/13/harrybo21s-perks-custom-perk-bottles-help/15397/msg151495#msg151495
https://www.ugx-mods.com/forum/help-desk/10/harry-bo21s-perks-unknown-item-bo2paerkbottles/15681/msg153259#msg153259

You need to add the model and animation to your mod to use his perks.
xmodel,MODELNAME

animation should be added to his .atr PackAPunch file based on the error.

More people ask the same question.

https://www.ugx-mods.com/forum/modding/13/harrybo21s-perks-custom-perk-bottles-help/15397/msg151495#msg151495
https://www.ugx-mods.com/forum/help-desk/10/harry-bo21s-perks-unknown-item-bo2paerkbottles/15681/msg153259#msg153259

You need to add the model and animation to your mod to use his perks.
xmodel,MODELNAME

animation should be added to his .atr PackAPunch file based on the error.

I put the animations for pack a punch in the .atr, but where do I put the xmodel line? I put xmodel,zombie_bo2_perk_bottle or whatever the missing thing was into mod.csv, and after building and compiling it still couldn't find it.

If that is the case you need to replace it with something else or don't use the model at all.