The gp32 should appear as an usb drive after you insert the cable and AFTER booting phodrive,
,at least on windows XP!! (98 reqs drivers)
Then you should see a GAME, GPETC, GPMM, GPSYS and MP3 folder on it.
If not all, make them. Then just copy any gp32 'exe" file to the gpmm folder