The first thing to do is to capture a list of all of your tn's on the Super loop to be removed. You will need to obtain programs that can compile new TN's for you. That will be the hardest part. Outing all the tn's should be easy using a script file with source data taken from the capture or another Overlay such as LD 83 etc.
Once that's done, then the superloop can be removed in LD 97. Check that you don't have a Trunks,Tie lines, (LD 14) XTD/DTR data (LD 13). Print off your SUPL & XPE data in LD 97 first.
This is by no means an easy & quick job to do. Preparation is most important thing to bear in mind & check that you have allowed enough time. As it's a Opt81, Then you could split the CPU & work on the off line CPU side.