Hmm, that sounds like ps/2 issues, try this kexts:

ACPIPS2Nub.kext
ApplePS2Controller.kext

I attached an archive containing them.

In Terminal, type:

sudo -s
password (your password)

cd /system/library/extensions

chmod -R 755 * && chown -R root:wheel *

cd ..

rm -r Extensions.mkext

kextcache -a i386 -e

reboot