Running a spoofed Hitachi drive shouldn't stop it from going into modeB, unless there's no xtreme firmware on board. Chances are, it doesn't which is why it's not working.
What version of Slax are you booting?
The other option is to either use the wires method for ModeB. I was under the impression that the Xecuter Connectivity Kit should work in this situaion, although I've seen posts to the contrary.
Edit: I found this thread elsewhere - take a look:http://forums.maxconsole.net/showthread.php?t=47214This post has been edited by Martinchris23: Dec 9 2007, 03:49 PM