Soviet if you have SB live in your system, I'd get rid of acpi - my box just wouldnt run with acpi enabled.
Urchin: if AH is the only game that uses joystick, I'd reckommend trying another game with your stick to see if the lockups repeat. If they do then its probably the saitek software..
Soviet: You can move things to different irq's by plugging them to another PCI slot - if you have ACPI disabled. If its enabled, acpi will remap your irq's and pretty much mess everything up. SB live is known for its picky nature on irq's. It doesn't like to share..
SB live is also known to cause big problems with motherboards that have the amd760 + via686B combination chipset.. I had one of those (KG7) and after fighting with it for a month I returned it and changed it to this KT266A board.. I've been very happy with this board and it's rock stable with the exception of via service pack 4.36 which messed my W2k up. 4.37a works great though.