But thanks to a forumer named "alabamas", OS X now sees, (yes, you're right) the non-multitouch Alps GlidePoint trackpad, as, well, a trackpad. Check out the new prefPane:
The driver is in testing stage so the controls are still not quite there yet - I could very well tap to click even when the checkbox for the feature remained inactivated. Also, scrolling which was magically enabled by default when the trackpad was still a PS2 mouse, is now missing in action. I thought I'd never miss edge scrolling but obviously I did. And much to my surprise at that.
Give the kext a try - you can get it from the forum thread here.
Mount your EFI partition first (Terminal, sudo):
$ mkdir /Volumes/EFI
$ mount_hfs /dev/disk0s1 /Volumes/EFI
Then drop the ApplePS2Trackpad.kext inside /Volumes/EFI/Extra/Extensions folder, go back to Terminal again to set permissions on the partition and rebuild the kext cache:
$ chmod -R 755 /Volumes/EFI/Extra/Extensions
$ chown -R root:wheel /Volumes/EFI/Extensions
$ rm -rf /Volumes/EFI/Extra/Extensions.mkext
$ kextcache -a i386 -K /mach_kernel -m /Volumes/EFI/Extra/Extensions.mkext /Volumes/EFI/Extra/Extensions
Verify that a new Extensions.mkext file has indeed been created inside /Volumes/EFI/Extra/ folder.
$ umount -f /dev/disk0s1
$ rm -rf /Volumes/EFI
Restart your machine.
Note: I actually booted with -v and -f flags as I normally did (thinking it a good hackintosher practice each and everytime a new kext is installed - a clean new slate, if you will) but that ended up with the trackpad not working when I got into my Desktop. So I restarted once more and this time, I let my usual non verbose mode go and trackpad worked.
Actually, I personally think an external mouse has more features therefore, is more useful. Poor Alps GlidePoint!