arse22

Things have been moved around. Anticlip morphs have been turned into body sliders (but they still save to clothing though, and they remove a couple.) As for the custom body morphs, they are still there just under different clothing types, I've been able to find more or less all that I needed. To pack addons together, you have to make them into their own single addon, like the old clothing pack posted on this site. Make sure to decode all .bs* and extract all t**, this helped me a lot with addons to determine if they work in VX or not. Even though VX has auto extracting and the like, I've found problems when using it and reduced problems by avoiding it.

Hmm, I think they will work as is, but it's best practice to decrypt, decode everything to .bs and remove the .b*b files. Make sure the replacers arent already available elsewhere (head and body section, hd archive, legacy on LL etc)

The 4x mod allows the head texture of a skin to be changed, by default the game will take 4k or other (especially w/ h5 layers) size. It also provides a lot of base 4x textures that fit 4x skins, like eyebrows, tattoos etc, otherwise all that will need to be resized by hand, since the default sizes are for 1k.
The body you linked was released long ago, on 7.5 the mod_prefix isn't necessary. If you are using this skin in VX, you should add mod_ to the textures and pass files (not the norms and specs.) VX also has a built-in auto-renamer so it will automatically rename the textures it needs to that are ported from 7.5, if you have it turned on in Options Manager.
Also, the author of that file mentioned it's 7.5 file in the description.

It's this one : https://www.klubexile.com/topic/18-request/