not easily.
The newer throttle-by-wire is available on the Gen2s - but controlled by the newer PCM. This PCM is part of the upgraded CAN network - meaning that most of the systems (I believe there are 7 of them - FEM, REM, Gauge Cluster, TC/ATC, DDM, ...etc) were upgrade to CAN interfaces. The Gen2 PCM is also expecting VVT, ...etc so there may be different engine sensors, ...etc that I haven't identified.