PSone Disc Image support is now officially almost on par with CD-based backup support, thanks to this update
DeanK has made a minor update to the multiMAN application, which now supports PSX NETEMU on disc images, which can be done by pressing ▲, and then choosing Game Settings, but however, the PSX NETEMU feature does not support multi-disc games for the time being, and this feature has only been tested and confirmed to work on post-3.55 firmwares, and thus, this feature has not been tested for 3.41/3.55 firmwares, although DeanK said that "hopefully 3.41 and 3.55 versions will work too".
DOWNLOAD LINK: multiMAN 04.19.06 - SendSpacehttp://www.sendspace.com/file/784ilp
DISCUSSION THREAD: multiMAN Support Thread - PS3Crunchhttp://www.ps3crunch.net/forum/threads/49-multiMAN-Crunching-Support-amp-Releases
DONATION LINK: DeanBG Donation Page - DeanBGtinyurl.com/donate4MM