The simplest way I know of:

Go to the NT machine you want to restore to.

Start the GUI client with a parm:

dsm -virtualnodename=name-of-machine-restoring-from


You can do this by starting from a DOS window (cd into the baclient
subdirectory first).
Or you can change the Windows properties of the GUI to include the parm.

You will be prompted for the password of the machine you are restoring FROM
Then what you see when the GUI opens is the file tree showing the backups of
the machine you specified as VIRTUALNODENAME.

Because you are restoring to a machine other than the one that was backed
up, I believe you will have to select a  DESTINATION for the things you
restore, even if you are just going back to the C: drive.  f you just
specify "restore to orginal location", you will get a very obtuse error
message, because the UNC names of the receiving machine don't match the UNC
name of the machine that was backed up.