Hi
I'd 1st try a different PC with XP on it. Beg/borrow etc !
Until you can get the driver properly loaded on something, you can't tel if the controller works or not.

Mine isn't redsail.
I us XP and network cable, so haven't tried the usb driver.
Mine is RDWorks, with an RD controller.

I haven't swapped my controller , and I believe some boards use different stepper motors

I know someone, who uses CNC drivers and Mach3 to control his laser, so it can be done, if all else fails :-)

Regards
Rich