You can get totally USB solutions for flashing with a laptop, you are looking at around £50 to get everything you need though.
Slimwadey used to sell Jtags, not sure if he still does but it might be worth getting in touch with him.
if you have lt+ 2.0 and never connect to live,your dae.bin might be a old version which is a good thing.can you still play xdg3 games?
see if the guy that can flash your drive use dashboard 13604 for now with the current latest releases