well i was told by AMSC's head corporate mechanic that the new Aerio 2.3 is based on the same "G" series motor as the 99-up Vitara motor. he says it will take some modification but it could mate to the 99-up 2.0L tranny with a little work, no direct bolt-up.
he did say how ever they are the same so the engine mounts should match up. from there he said you'll need 99-up Vitara bell house and all Aerio computers and wiring. He shook his head and said wiring this motor and with newer vitara stuff in 1st gen suzuki trackkick wil be a nightmare.