oki guys, i talked to STT on IRC, and he told me to try this, AND IT WORKED!! ;D
oki, first, get pbo_decryptor 1.5 and pbo tool/stuffpbo...NOT makepbo.
then u decompress the sebnam_objects.pbo with pbo_decryptor, then u just compress it with pbotool, put it in the addons folder and then do what STT told u to do, add the pbo again and place it just like the original objects!!
thanks SelectThis
Garcia
(now, get to work lads, and get me a nice nam island)