From your tag it looks like you have an R3 Classic so the comments about the R3T do not apply to you.
I'm not sure how your friend intends to accomplish this without some sort of 3rd party product such as a Tuneboy or a DynoJet product (PCIII/V). Tuneboy or a proprietary Triumph Diagnostic Tool are the only known ways to reprogram the electronic control unit. The Dynojet products are modifications to the program after it goes through the ECU.
I'd ask some more questions before going any further. Something doesn't sound right with the information given.