To me it seems that there's 2 options:
1. Older ECUFlash with FTDI drivers.
2. Latest ECUFlash with Tactrix drivers.
Your instructions are for #1, but as you mentioned above, it's a huge PITA to get older version of ECUFlash.
#2 seems very odd, but I'd like to try it, since I got #1 working. Can anybody who's doing #2 link me to the appropriate Tactrix drivers please?
Thanks!
-Sergei