Download and install Microlite Edge.
Microlite Corporation - Home of BackupEDGE 3.x then do a backup to DVD, you may need two disks for the 42gb of disk space used.
Create the emergency boot dvd.
Temporarily replace the 1tb disk and boot from the recovery dvd to do a full restore.
You can do this with the demo version of Edge, but only for 60 days.
When you create the new disk, only use 100gb for the Unix partition rather than the whole terabyte.
Do you have a plan for updating the backup disk with current data, assuming that the application is not read only?
This will not work if your application is copy protected and you cannot re-license it, as files will not have the same inode number on the new disk.
You should expect to spend 4 hours doing this.