@Amsal i dont understand what you want to do exactly ....
maksed compression is all about masks and different algorithms
if you want to skip a program simple edit this line
-mprecomp+srep64+rep:512+delta+exe+xz/$void=srep64+zstd/$text=srep64+zpaq
this is the command to skip MSC ......MSC only compresses textures wav sound mp3 sound and bmf format
packjpg compresses jpg format completely different things
@Kazamnuk
i dont like GUI at all ....
because i dont like GUI i am able to contribute projects like this
i experiment i use many programs that i find
i constantly update my entire Repack library
BUT... Felice has made a nice effort to make a full yet user friendly GUI for newbies he will update to masks eventually so keep an eye out
Peace !!