HELP automount vfat

A Fedora user. Note that in Fedora 9, there is no more 'Core', and no FC anymore.

Modify the fstab:
(change the line with /30G volume)
/dev/sdb1  /30G  vfat  defaults  0 0

Have a look at http://www.tuxfiles.org/linuxhelp/fstab.html

--
If you mean automount in Gnome, it should have nothing related with fstab. Try searching hal and automount in Google.