Backup Exec 10.1 D2D2T scheme questions

I have set up a disk-to-disk-to-tape backup scheme using backup exec where all of the servers back up to disk for a week (1 full and 6 incremental) after which those backups are backed up to tape and moved off-site. Here's my question--how do I find a file that is several months old and no longer exists in the catalog of backed up files in backup exec? So for example I have a file named test.txt on a server and I need to restore it from a backup that is 3 months old that exists on a tape.
1.) Is there a way to search the disk-to-disk backup on the tape (because the tape will only have the .bkf file from the disk backup)
2.) Is there a way to restore a single file from the .bkf file that would exist on the tape without having to restore the entire disk-to-disk backup (which is what the tape would hold) and then import and restore from that

So I guess the problem is that I have a backup file inside another backup file and I'm curious if there are tools, or if bexec will allow you, to restore from the inner of those 2 backups.

Any help is appreciated

Thanks