1. Download
cube_2004_05_22_pocketpc_bin_xscale_opengl_es.zip (don't worry about the date, the files within the zip are actually from January 2005)
2. Unzip cube_2004_05_22_pocketpc_bin_xscale_opengl_es.zip
3. Copy the entire unzipped
cubeppc directory to your SD Card (I use WiFi to connect to my local workstation via shared drives, but you can use a card reader or try ActiveSync)
4. On your Axim, use a filemanager to browse to the
cubeppc directory on your SD Card and click on cube.exe to start Cube.
The result is QUITE breathtaking!