Digital BW, The Print

Is there anyone on this list who is using ColorByte's ImagePrint RIP 
(Mac OS X version), who has been successful in getting Photoshop to use 
the ImagePrint-supplied printer profiles for soft proofing?

I have been soft proofing against my prior self-created Monaco Proof 
profiles just fine, but Photoshop doesn't even want to list the 
ImagePrint profiles in the Proof Setup Profile selection list (likewise 
w/any other profile selection list; i.e., Assign Profile, Convert to 
Profile, etc.).

Is it even conceivable that such a "professional" RIP would not utilize 
printer profiles that Photoshop can soft proof against?

If anyone is soft proofing with these ImagePrint profiles with success, 
I would very much appreciate your help...

/eddie