Important update on dealing with the "fixed" vs removable drive issue...
Guys, while keeping up with Dietmar's thread on USB booting I saw that he mentioned something called the Hitachi Microdrive Filter driver from XPe Files....Turns out it's a filter driver that makes any removable drive appear as fixed to XP. This means any drive (either external or with an adapter) can be partitioned or formatted ad NTFS. More importantly this takes care of the ACPI issues we were having with the ExtremeIII cards!!! I just tested this on my ExtremeIII card installed in a USB CF card reader.
To get the driver go here: http://www.xpefiles.com/viewtopic.php?t=92
Unzip the files and open the cfadisk.inf file. In the [cfadisk_device] section add a line for your device. You'll have to do this by opening up regedit and going to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum and from there it depends if it's a USB drive (USBSTOR), IDE (IDE), etc. You need to copy the HardwareID registry value for your device.
For my USB CF card reader it was located in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\U SBSTOR\Disk&Ven_Generic&Prod_______________CF&Rev_ 1.6E\0000001&0
So in the INF file I added the following line:
%Microdrive_devdesc% = cfadisk_install,USBSTOR\DiskGeneric_______________ CF1.6E
Then you just go to the properties for that drive and manually select a newer driver and install the cfadisk.inf drive. That's it...So now if you want to use an ExtremeIII CF card (or any other card for that matter) you can simply install this driver and you're set. :)