I got 10.5.2 to install. I installed it over my Tiger install and I selected my video card drivers, lan drivers, 9.2.0 ToH kernel ext. The computer restarts and I get the grey screen with the apple then I get a darwin panic and the computer restarts. I booted in -v and this is what I got:
<a href="http://s37.photobucket.com/albums/e95/dannymayer/?action=view&current=panic.jpg" target="_blank"><img src="http://i37.photobucket.com/albums/e95/dannymayer/panic.jpg" border="0" alt="Photobucket"></a>

Any Suggestions on how to fix this?

Your EFI is not installed properly. AppleSMBIOS.kext will cause this panic if EFI isn't setup properly.

How do I setup up my EFI properly?

Try running the install disk again, choose the same options with EFI for MBR.

Doesn't work.. I have the same problem. Only my install was over my 10.5.1 working install. I'm using MBR. I checked to make sure that MBR was selected with the 10.5.2 installer.

But your EFI might not of installed correctly. As you were most likely not using EFI with the previous version.

You need to try and set it up manually. The hurdle will be getting to the files, as you need a drive mounted with the EFI files while you unmount your Leopard drive. These are the commands you need to run from Terminal.

thanks for the suggestions but I found the solution, from another user, it was because my drive name was Untitled 1 and that space somehow made the system screwy. So I renamed it to Leopard and now everything is working fine. Thanks again!