Hi, I'm new here.
OK, this thread is a litte bit old, but I managed Code::Blocks 8.02 to work under Windows 98 / ME and I want to let you know how I did this.
First, it is not as fast as under Windows 2000 and the Help menu doesn't work (C::B crashes) but all other functions are working well.
I needed a good IDE for Windows ME because I'm working on a driver for my good old 3Dfx Voodoo5 5500 (I have the original driver sources from 3Dfx).

C::B is running well on my german Windows ME.
All you have to do is to install "KernelEx 0.3.6" from
http://x86.neostrada.pl/KernelEx and add codeblocks.exe=winxp to the file %WINDIR%\kexver.inf and install the Unicode layer from Microsoft.
Now you can start Code::Blocks and it will run. It looks like there are some bugs with Opera, because I had some crashes when running it at the same time.