some people have problem with PS2SMB, so i hope this thread can help you. iam using win7 and i guess sharing option would be different from other OS.
so lets start!
open properties of the folder that u want to share.
my folder is PS2SMB.
then go to sharing tab and click to Advanced Sharing
tick share this folder. then go to permission and tick allow all. its not necessary though, just leave 'read' allow ticked should be ok to make the game show up in OPL under network game.
now back to sharing tab in the folder properties.
click share u will see who was sharing with this folder.
at 1st i saw only my user account. (whoops haha revealed)
check for people like in this image say
select 'Everyone' and click add.
as always the default permission level is read but i change it to read/write.
finally click share and next window pop out, just click done
also after i know this all. this link. http://home.comcast.net/~jnabk2/openps2/networking.html also mentioned it. u made this JNABK?
EDIT:Whoops. tht large haha sorry