Last night I recorded an impulse response of my building's parking garage with fairly decent results. After importing into Altiverb 7, I couldn't figure out how to add photos or other metadata to the user created IR. Also, I recorded the sine sweep at a couple of different distances from the speaker, so I'd like to combine the two impulse responses into a single user entry, similar to the pre-loaded Altiverb responses that have different mic options.
I haven't got around to creating IRs with 7 yet, but the IRs I created with 6 (with pictures) transferred just fine. Essentially, you just put pictures in a folder with the IRs:
"---|" = Folder
---| My IR
------ My IR.jpg
------| My IR Audio
--------- My IR Stereo.sd2
--------- My IR Mono.sd2
Structuring your IRs/images in folders like this should work. I'm not sure about adding any other kind of data.