You do not
need a floppy and YES you can
slipstream the SATA drivers onto the windows CD I know this because i have done this before.
Check out this page, Green Machines Space
It is a dificult thing to do for a n00bie but read everything carefully and if you need more help checkout THIS PAGE
under the Unattended Windows Discussion & Support tab.
You can also use google to search for more, there are a few more pages i used but i am on limited time at the moment, when i get home tonight i will track down some more info for you.