I too did a lot of reading on many forums. The common theme for those with problems was they put the ignition in ACC, needs to be RUN mode
I downloaded on my pc each in separate folders the .iso file 33.01.23 and separate folder for 50.01.01 just to keep separated. Go to Download Now | MyGig RHB 50.01.01 Software Update
I already had Magic ISO burner to burn each .iso file to separate CD-R's, don't use DVD. At mygig are free ISO burner software downloads. I burned at the slowest speed, 8X. Make sure you "finalize" the CD after burning
For the TSB go to http://www.wk2jeeps.com/tsb/tsb_wk2_0806113.pdf
Follow the TSB and be patient, you'll get some black screens as it upgrades
I put in the first CD to upgrade to 33.01.23 after it completed, removed the CD as instructed, turn the GC off, started the engine just run the it a minute, tested the radio, saw that it did upgrade. Then repeated the steps for 50.01.01
I'm not a huge techy guy, just enough to understand what to do and follow directions
Hope this help, I do like the new screen look with my black interior, do go and read up this and do it!