I’m currently on vacation, so I’m not able to do more in-depth testing (that’ll have to wait til monday 😉), but to give an example, these are my Diablo 2 mounting commands (Win95 on a 512MB C drive, Diablo II on a 2GB D drive):
imgmount c /storage/0000-0000/Games/PC/Win95/c.img -t hdd -fs fat -size 512,63,32,520
imgmount d /storage/0000-0000/Games/PC/Win95/2GB_Diablo2.img -t hdd -fs fat -size 512,63,64,1023
boot -l c