location problem

I'm a new OrangeCD user, so my question may be fairly basic-- I'd like to add "location" data to my albums, and can't quite figure out the best way to do this.

I am attempting to use OrangeCD to catalog my mp3 and FLAC archives, which are spread out across numerous CDRs and DVDRs, each of which has a number. I'd like to be able to use the "scan media files" command to add these, but it doesn't let me easily add the location (that's the number of the disc) to them all at once. Instead, I have to go back in the large list, select them all, open up the edit all box, and go to location afterward. I imagine this is going to be troublesome after awhile. Can anyone help me out with this?

Thank you!