I did the upgrade with the USB cable. You have to read the instructions carefully. I took my time to make sure I didn't miss a step. The instructions aren't completely accurate in all cases but it should be easy to work through the small vagaries. My laptop is a very current XP Professional setup.

I agree with the earlier comments that loader should be easier to use and be more reliable. I also think it should be fairly simple to read the old config and restore it afterwards. Being able to store more than one firmware image would be a plus also.

C'mon Mzpro5 let'er rip.