Having 2GB of anything won't help your situation. If you are on T-Mobile, you must be using a BB Curve 8320. Your profile appears to be incorrect.
All you should have to do is to re-run the executable that you downloaded in the first post of this thread. Then, delete ONLY the vendor.xml file. After that, Desktop Manager should see that there is a new program for your BB. Give it a few minutes after it syncs up and it should pop up the screen to try and load the new OS.