Really old post, but...
I've succeeded in building the R600 Bitcoin Miner on a 32-bit machine. It was kinda painful, as OP has said, but not too bad.
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
I'm willing to sell the 32-bit build of this app on a bounty for 3 BTC, 2 BTC less than OP's price (barring BTC value increases).
Please note that this miner doesn't have great performance on crappy GPUs, end of story.
(However, if you have a better old AMD ATI GPU, it might be useful...)
If anyone submits an improved Brook+ source file for mining, I'll deduct 0.5 BTC from the cost (up to 1.5 BTC).
I've also created a build system for the miner. I'll release it on GitHub for a bounty of 5 BTC, since it took me a while to get everything working.
Included is a list of all the programs needed, with direct or close-to-direct links to download the programs.
So in summary: 3 BTC for the 32-bit build (-0.5 BTC for every optimization), 5 BTC for the build source!
http://imageshack.us/a/img685/8015/screenshotminer.png(And yes, that's Windows 8... the Classic Shell and the Windows To Go feature are the only things keeping me here.
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
Note that the build should also work on older OSes, like Windows XP/Vista/7.)
Build system screenshot:
http://imageshack.us/a/img40/7412/screenshotminerbuilder.pngBuilt with Visual Studio 2010 Pro, Python 2.7.3, Cg 2.0, Boost C++ 1.51, Numpy 1.7.0, and Brook+ 1.4.1 beta on Windows 8 x86