So I had given up on getting the i2050 to work since I still have an ancient BCM 3.7 system. But then I found out some of my users had gotten hold of the V2 version of the software (build 255) and had been using it successfully for a couple of months. Of course, I've yet to find anything from Nortel that says it's supported on the 3.7 but heck it seems to work so we'll use it for now.
I've seen some references online that the V2 version of the i2050 CD can still be purchased but I haven't found it in stock anywhere yet. They're heavily pushing the new V3 but I'm pretty sure that won't work on my old 3.7 system.