While they cant currently be mounted, they can be converted into a format whdload can use in some cases.
"mfm2wwarp game.ipf game.wwp" will convert the ipf to wwarp format.
"wwarp game.wwp f" then "wwarp game.wwp g" should produce the Disk.1 file some whd slaves use.
If the installer uses rawdic, you can select the game.wwp file once the imager starts instead of inserting disks. (Requires at least RawDic 2.2)
been a while since ive needed to use the above procedure though so if ive missed anything im sure psygore or codetapper can fill in the gaps