ok, some people have had some problems with there cfg fstab ( not being able to boot! ):
when you get to the point when it wants you to rescue/fix the problem in the read-only mode, type:
mount / -o remount,rw
this will gain you full write access to the "/"/root partition/dir.
copy fstab to a floppy:
mount -t vfat /dev/floppy /media/floppy/
cp /etc/fstab /media/floppy/fstab
umount /media/floppy/
this should get you the fstab on a floppy, to cfg on another pc. try to repeace your old settings ( get rid of the ",usrquota,grpquota" )
next, mount the floppy again ( after you've modded the fstab [ from the floppy ] on another pc! ), and overwrite it to the /etc dir:
mount -t vfat /dev/floppy /media/floppy/
cp /media/floppy/fstab /etc/fstab

THE END -and the allies win!