Hi, thanks for your reply.....

im still not exactly sure what im supposed to do? when i try type vanilla_kernel whilst in -s mode at startup it says command not found, and i have a file in my 'Leopard' directory names vanilla_kernel.

what happens if i replace the current mach_kernel (9.5.0) with vanilla_kernel? obviously ill make a backup of the 9.5.0 as mach_kernel.backup just incase anything goes wrong, i can then restore it right?