Many of you would have received Guitar Hero 3 PC as a Christmas/New Year/CNY/Birthday/Random gift. The point here is that you were too excited and ripped of the wrapping. You took out the CD in absolute ecstasy. You then proceeded to insert it into your laptop/desktops DVD 4x drive. The rest went on smoothly, you installed it and then plugged in the supplied guitar(if you bought it) or not(if you dled it).
After the above, you went on to click the icon on your desktop. Alas, an error message pops up, something like this:

It took you a full minute, before you unleashed your anger and started cursing your stupid laptop/desktop for not meetin the graphic card requirement!!! Then you slapped yourself for buying/asking for the game, realising that you just wasted $150 on a game that your PC does not support.
Fortunately, you can be saved from the boos and jeers and the shame that you dread now that school is on tomorrow. You would become a social outcast. I have the solution to all your problems: 3D Analyser:
"3D Analyzer is a program to analyze and to yeild the performance of a 3D card, and to improve your performance yield in 3D games of a notable form." - some website on earth
These are the steps you need to follow, as I did to get Guitar Hero III up and running on my LG F1 express dual, with a 2.5 gb ram, an Intel GMA945 Graphics Driver and a centrino duo processor working at 1.73Ghz.:
1. Prepare for the following steps: Download the following:
3D Analyser V 2.36 (http://www.falconfly.de/downloads/3danalyzer-v236.zip)
GH3 Boost (http://www.2shared.com/file/2684330/fc57fc1f/GH3Boost.html)
2. Now, lets get to business. First, install and run 3DA.
3. Click select and navigate to your guitar hero exe file(not the shortcut) (C:/program files/Aspyr/Guitar Hero3/GH3.exe
4. In your 3DA, tick and change your driver settings to the ones shown below in the picture:
Incase you can't see the options clearly, here they are:Force SW TnL
Counters
Disable Lighting
Force low precision pixel shader
Emulate HW TnL caps
Emulate other DX8.1 caps
NVIDIA GeForceFX 5900 Ultra - Vendor ID; 4318 Device ID; 816
5. Once that's done, you can click run, and GH3 should work. ^_^
6. In Guitar Hero, go to options, and set everything to the lowest possible quality. Now you can play GH3.
*7. Some people on other sites have complained that when they used this method, GH3 would work, but when a song is selected, it goes to the loading screen and crashes. This occured on my laptop, but the GH3 Boost which I made you download is the solution.
Open 3DA, and select the folder in which your gh3 boost is stored. Select totalboost.bat
Warning: this file assumes that you have GH3 installed in C:\Program Files\Aspyr\Guitar Hero III
Now click run. A screen should open up.
Once the process is finished, select your gh3.exe file once again and run it. There should be no problem this time. However, there is a price to pay, and that is that you will not have any animations while playing a song, instead, a black background. :(
But, if you really concentrate on the song, you should not need the animations, which only serve to distract you.
If you want to revert back to the original (With anims) open the gh3 boost folder again and select the restore.bat file.
HAVE FUN PLAYING GUITAR HERO III,
Signing off, NUxCT
