Hello and sorry for coming with a late reply!
I did as you told me, and the result is the same dissapointing one unfortunately.... the games enters a black screen when selecting the custom pose and crashes the game afterwards.
I used Chapter 1 of Zombie Outbreak Scenario ( 100 PNG and LUA in total, 50/50 ), in the Scripts file didn't inserted any of your Scenarios as you told, only
FriendlessPanda 's Script as I wanted to try it out, and fortunate enough it works, and downloaded the custom mods from the OP 0.56 stable link. Other than that, I didn't deleted/added files/folders in the game's files.
I don't think that I should delete the original poses from the Captures game file, or do I?