Heyyo,
Ah, amx mod x installer, that's good.
Now, then, forget what I wrote, and post on here what's in your "liblist.gam". Just open it with notepad or someother text editor program (like openoffice, omgz! freeware pwnage right there
).
Once you do that, I'll show you what your liblist.gam file should look like to include meanmod.