When installing Windows 2003 to Dell M600 blade system windows will not recognize any hard drives. You need to load additional drivers, by pressing F6 during setup. Drivers can be found at Dell FTP site, but Dell is not providing floppy image, just drivers.
Attaching floppy drive is very easy using iDRAC, you just need to create image by yourself. It can be easily done in linux (see this howto) or you can download mine image from here.