You will need an EPROM ECU out of a '95 2G GST/X.
All of your questions regarding DSMLink will be answered at
www.dsmlink.com
The most important part about modding a DSM that most people skip is to get the car dyno-tuned. Too many people slap on parts but never get the car properly tuned and then wonder why the car runs like shit, is slow, blows up, etc.