Systemupdate on AMD isn't that difficult, if you're running Voodoo or Voodoo based Kernel. - Most important is to create a Back-up of the Kernel Binary, so that you can boot into your system, once your done.
You also need to ensure, that you have either dsmos.kext or AppleDecrypt.kext and Disabler.kext been installed on your System. (Systemprofiler / Extensions)
Then do the following on Terminal:Run the 10.5.8 Update and use "/back_up_kernel -v" as Parameter on next Bootup.
You will propably run into a number of issues.
I recommend to copy back your old Kernel & reinstall the system.kext & seatbelt.kext Extensions from your /Extensions_backup folder using KextHelper.
If you still have trouble - report back. Good Luck. :)

Reffering to your Graphic I would try to use nvkush.kext - but I guess just installing it, won't get you fully graphic accerlation.
You can get nvkush from here: http://diabolik1605.com/DHF/NVkush/N...taller.pkg.tgz
After installing & rebooting you should be able to change your resolution, etc.
But I recommend to check, in the Systemprofiler, if you have Quartz Extreme enabled - if not, you will need to add your Device ID to the Info.plist of the following Extensions: GeForce.kext,NVDANV40Hal.kext, NVDANV50Hal.kext, NVDAResman.kext & NVkush.kext - Tell me, if you need further instructions. :)

im still a little unsure about the update right now that can be put on hold for the time being. I installed that gfx driver and it wont boot up again after installing :( also still after trying to get the mouse and keyboard to work if you know about that too.

how do i find out the device id and add ???

also Quartz Extreme is currently disabled

thanks :)

Display:

Type: Display
Bus: PCI
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0531
Revision ID: 0x00a2
Displays:
Display:
Resolution: 1024 x 768
Depth: 32-Bit Color
Core Image: Software
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Not Supported
QuartzGL: Supported

thats what I have at the moment

Sorry for the late response - I was very busy...

Looks good so far... :)

Open the Terminal and use the following syntax:An Editor will open - look for <key>IOPCIMatch</key> and go to the string bellow and add 0x053110de to the beginning of the field within the <string> tags. Write out using Ctrl + O and exit using Ctrl + X - repeat this for all the *.kext files I mentioned in my earlier post.

On next boot-up enter -f option on the bootprompt. :)

no worries at all thanks very much for all the help im going to give this a crack shortly I will post back soon

thanks again