We all had to take a chance that we would remove the wrong audio track, after a while you will be a natural.
You might want to get the latest firmware here:
And if you get the bitsetting tool here:
All your +Rs will be set to ROM.
I wouldn't waste your money on 16X media if you are burning at lower speeds. You might try Burnmaster +R TY 8X from allmediaoutlet. They are very high quality and, while I am not sure about your 1633, they are superb on my 1693.