Like "Gay R0b0t" (nice name
) said add something like:
/dev/hda2 /mnt/wherever vfat auto,rw
I think the last bit is right, i'm in windows at the moment so I can't check. You need the auto is you want it to automatically mount everytime Linux boots, and I think you need the rw to make it not read only. You may have problems writing to it if is an NTFS partition (of course if it is NTFS you replace the VFAT with NTFS).