1. As usual, I'm clueless about what happens to Marvel Girl.
2. If I recall correctly, I rearranged my Box.net files for better organization. I even deleted some files, because of the updates. Probably the links you went for weren't updated. What I can do is try and post right here all the links as they are now.
On the other hand, try downloading the latest versions of Super Skrull and Marvel Girl, wich are supposed to be posted in the Character Mod Catalog. I'll check my account and the links, but right now I just finished with university work and it's very late around here.
3. Glad you liked the mod, if there are still problems, I'll try and check them in the week (I know I have some other mods pending, I'll do MG until I recall wich ones).