Hello guys and thanks for the feedback :)
elandyno: I have LAN game support in mind but that'll be for later when I'll be motivated enough as it's often a hassle to get working in an easy fashion.
About that Meldpack issue, it's a known bug that I've yet to fix for the next version of the pack. Not easy!
Privata: I doublechecked and it seems to me like effects occur properly ingame. Don't hesitate to post screenshots to compare if necessary! That C2 issue sounds outstanding as I've never heard about it before?! Maybe trying another glide wrapper could help?
On another note: PC versionf of the GTA Max Pack should be final. New Mac OSX version added in the first post.