O(ff)T? or O(n)T? 22DISK on a PC

I've put off asking about this in view of the discussion about what's on/off topic, but I need some help from Those Who Know These Things. My specific requirement is to put together a PC to run 22DISK, my DOS-only PAL/PROM programmer software, and the like. It will run DOS 6.22 in a FAT16 partition (and probably WinXP in another partition because I will not permit more than one PC in my workshop, but that part is definitely off topic so I mention it no further). I want it to be able to support single-density floppies, and eventually 8" drives too. Available "ingredients" are an Intel SE440BX motherboard (if it matters) with a P2 400 and stupid Intel/Phoenix BIOS, a Teac FD-55GFR 5.25" floppy drive, choice of any number of 3.5" floppy drives, the usual other bits that go to make a PC, and a few harddisk/floppy controllers, including a Western Digital WD1006V-MM2 F002, and a Western Digital WDAT-240. I have a couple of older no-name ISA floppy cards but I suspect they won't support HD floppies (though I wonder if they'd support 8" DD? Same speed...) and I probably have other 5.25" drives somewhere. I picked those controllers, by the way, because they have 37C65 FDCs and the magic second (9.6MHz) crystals and are reputed to do SD correctly. A problem is the braindamaged BIOS/mobo, which only handles one floppy. Yes, really; not content with bastardising the interface to enable cables-with-a-twist, they've removed all drive selects but one. No pins, no PCB tracks, or in the words of the manual, "no connection". However, if I disable the onboard FDC in the BIOS, I can persuade the machine to see the FDC on a WD1006V-MM2. Only it won't boot; it gets so far and then hangs. It almost looks as if disabling the FDC in the BIOS actually disables support for an FDC at the primary address, and MS-DOS can't complete the boot. Do I need to do something with CONFIG.SYS? Maybe it would be better to leave the onboard FDC alone, and use the WD controller as a secondary? I guess I do need DRIVER.SYS for that, yes? I have a similar problem with the HD controller. I want to use two IDE channels, but I can't disable the HDC on a WD card; I can only change the address between primary and secondary - and I can't even do that on the WDAT-240, unless someone here knows something I don't. But I can't get the PC to work properly with the IDE controller on the WDAT-240; if I leave the onboard controller enabled, they fight, and if I disable the onboard controller in the BIOS, it seems to stop the WD controller working properly. Any suggestions? -- Pete Peter Turnbull Network Manager University of York