Everything seems to work fine now.
Made my full bootleg install and backup.
Made a new ff7 install, up to 1.02, aali, hardcore mod, reunion, AH and all working fine.
Tested 7th heaven, working wonders.
Then replaced some of the major files, lgp for models and other stuff and the full bootleg mod png's folder, not replacing anything from reunion install (just some minor stuff colliding anyway).
Looks good so far.
Wonder how the mod folder must be organized... Is the png presence by itself enough to make aali driver replace it or does it need to be in a specific folder? What happens if two png's with the same name are present?
By the way, what's with the "textures" folder that bootleg installs on the root of ff7 dir?