USB 1.1 isn't fast enough. I had the same issue and added a PC-Card with USB 2.0 and the external DVD recorder (which plays DVD too.)
There used to be an USB 2.0 only offering for 20 bucks, but it's not there, look around.
i hsve a laptop which only has a cd player and want to add a dvd/cdrw i have 2 ways to do it i can replace the original cd (ibm PII 600e and compaq evo 1050) or go exteral with the usb post but is usb 1.1 fast enough for dvd playback (both computers have a pcmcia II port)
thank you thegreatfixer