rvs/immobilizers programming required?

I may be running a new game-plan. Based on the requirements for proper firmware update before installation of the ADS-* bypass modules I'm thinking to take the advice of switching to an all-in-one solution supposedly factory preloaded with firmware covering my '09 Malibu -- Compustar's T-GM2-1WG6 (also made by iDatalink). This seems like an even simpler option as it's a single component box AND includes P-n-P wiring harnesses for the non-elective connections. Now I just have to ask if anyone familiar with this product can verify that out of the box this is preloaded with the firmware required for my vehicle. Although it is at odds with what I believe I was told the install instructions state "Firmware flashing is required prior to install, module is not preloaded". Hopefully this is only for additional vehicle model compatibility.

Everything idatalink makes requires a flash. I've seen a lot of times guys post in the forum that they bought stuff online already flashed with the proper firmware. I just don't know where the best place to buy it from so its ready to go. Maybe someone can post a link or two

Because everyone here has been so helpful I just wanted to clarify a few things related to this thread which may benefit other non-industry visitors (like me) stumbling upon it in the future. The T-GM2-1WG6 is actually sold by Firstech. Basically a 1/3,1/3,1/3 collaboration between them Compustar and iDatalink. It was originally shipped pre-flashed for a select number of vehicles but all current units require firmware installation/update prior to use (as just noted by blanx218). As for me, I've decided this was a no-brainer. Now that it's getting colder her in MD I'd like to spend as little time under the dash as possible (no heated work area). The T-harnesses which encompass most every connection should go a long way to expediting the install. The system as a whole does just what I need in that it totally replaces the factory remote entry, alarm activation and trunk latching (the two first of which no longer operate and req $$$ for factory parts & programming) while adding the sought after remote start option. The only thing not available is a rear-defrost option but no biggie. Thanks again to everyone for sharing your knowledge.