Let's step through this:
CPS 10.0 Build 510 installed and you rebooted, correct?
After reboot you can read and write to your 6550?
You downloaded the firmware update package R01.12.02 for PORTABLES, ran the executable and rebooted, correct?
After reboot, when you connect your 6550 to the CPS and click on device and update, it says no matching packages found? Correct?
You didn't attempt to redirect the installation files of either the Trbo CPS or the firmware files from where they wanted to install themselves by default? (That won't work)
R01.06.20 is really old. You might want to try a much earlier file for upgrade first, there are some huge architecture changes between 01.06 and .07. I would look for something in 1.07 or very early 01.08 as a mid upgrade and try to two step the radio, although you shouldn't get the no matching packages found message in any case.
I am assuming you are running at least Windows 7, since Windows XP or earlier is NOT SUPPORTED in Release 10 and may or may not work correctly depending on your computer hardware.
Over to you.....