its EECIV so yes its mapable (but then so's the twinky) but it wont reference against boost, so you won't be able to get decent driveability.

what you want is an ignition retard unit like the EMS5 or EMS6 (google) which is a piggyback module that will advance/retard the timing foryou for on-boost.

that way you get your decent driveability, and your on-boost safeness