Basically, Duvie was able to hack the Nvidia forceware drivers with a patch for his FX5800 ultra. I think it turned his card into something between the performance level of a Quadro FX2000 and FX3000. If you have a non ultra 5800, it will turn the card into something as powerful or a little less than an FX2000. At least, this is what I remember. The patching unlocks Quadro features, which tremendously boosts its workstation ability. I remember that you could ONLY use the 4x.xx forceware drivers for this "softmod", and nothing later than that. He recommended the 45.23 forceware drivers.
With credit to Duvie, the following is from his 5800 thread:
1) Go to
www.guru3d.com
2) Download Detonator Forceware drivers version 45.23 for winxp/2000
3) Download RivaTuner20RC143NY.zip
4) Download DC3Setup (Driver cleaner)
5) create a folder and place all of these items in them.....
6) unzip and install RivaTuner....
7) unzip and install driver cleaner but don't run yet....
8) extract the 45.23 file into the folder you created...
9) Go to c:/program files/Riva Tuner/PatchScripts/Nvidia (leave open for abit as we have 4 patches to do)
10) then go into the NVstrap Antiprotection folder and double click the win2k file. A pop up will occur...hit continue...then in the next pop-up browse to the folder you created with the extracted driver file. Then click the corresponding file and open...
11) next go into SoftQuadro and click w2k file and direct it to the same folder...
12) next go into the AnisoBoosterOpenGl folder and do the same as the other 2...
13) Finally go into the DetonatorFXAntiprotector folder and do the same....
14) don't reboot yet....launch the driver cleaner program and pick nvidia and remove the existing files....may have to hit clean a couple of times until it can't find any files left.
15) go to My computer...right click....properties....hardware tab...device manager....under display adapter click the nvidia FX5800U card and right click to uninstall....At reboot prompt reboot...
16) at startup it will find vga device...hit cancel....
17) go into the folder you extracted and patched the 45.23 drivers and run the setup....reboot when asked and when you re-enter it should be identified in the device manager as well as the rivatuner main tab as a Quadro FX2000 card...