Some CF cards identify themselves as removable disks as opposed to fixed disks.
This poses a problem when using a CF card as the primary install drive for Windows, which will not enable DMA or pagefile on “removable” disks.
The solution is to force the driver for a Hitachi MicroDrive on the CF card. (Not the IDE controller)
(File source: http://wayback.archive.org/web/*/http://home.graffiti.net/jaclaz:graffiti.net/Projects/USBXP/xpfildrvr1224_320.zip)
(Ref: http://www.thinkwiki.org/wiki/CompactFlash_boot_drive)