proper way to write changes in grub.conf

[John Aldrich]

Is there a nice GUI or something to help me make sure I don't screw up my 
grub.conf? I'm trying to make my mouse work better with my KVM and have 
edited the grub.conf to add the "psmouse.proto=imps" to the end of the kernel 
line, and have saved it, but I don't know how to properly write it to the 
system. I know if it were LILO, I'd just run "/sbin/lilo" as root and it 
would be updated, however, just running "/sbin/grub" asks for more options, 
that I haven't got a clue about!
 Thanks
 John