Hi,
If you followed the instructions given on that site it should simply work (I followed them a few time by the letter without any problem) ... btw here is what I can tell you on the /hdd1 and /hdd2 structures :
/hdd1 contain .sys/ and usr/ directories ... the .sys dir contain hdimage2.tgz which is the default content of hdd2 and a file named hdlist1.dat which contain a listing of all the files present in /hdd1 and the usr/ dir contain usr.rom , bin.rom, sbin.rom, QtPalmtop.rom etc ... (as you can see by simply opening the archive) ... the /hdd2 directory is repopulated from the hdimage2.tgz during first boot of the device (or when you reset it using the maintenance menus).
Hope that can help you btw I didn't understand well what you wanted ? (the file listing you can have it by simply open the archive on your desktop computer as it's a standard tar.gz archive)