OK, I just did this and there was a BIG...BIG differnce.
My IO Magic came with G7C9. It was shown on the drive, but you may as well install it and read what it says from Nero or other tools. Even Device manager will show it.
Make sure the IO Magic box says that the DL speed is 2.4X. If not, it is the BTC.
OK, the drive worked fine but was slow and had bad scans of my DVD+RW media.
I got 2 things...
windwflash and B7P9.cvt.
Turn off Virus protection, stop web surfing, and disable firewall (software).
Also a big thangs to Rolling56 and Kenshin for pointing me to the 2 files.