It does work with this one:
http://ncix.com/products/?sku=34686&vpn=SD-SA2PEX-2E&manufacture=Syba
There is a little trickery involved, but it works.
Here's how.
Insert the HDD you want to run windows on into any INTERNAL HDD slot of your pro and install windows on it...
After windows is installed make the Windows drive the startup disk in sytem preferences.
Then, put the Windows drive in a eSATA enclosure and hook it up to your pro. Now every time you start your pro it will automatically boot into Windows from the eSATA drive.
If you wish to boot OSX just hold the option key and select the OSX drive, note that the Windows drive will not show up! So you have to select it as startup disk BEFORE you hook it up via eSATA!
When booting windows it will show a ton of errors, some kind of partition problem, idk. just ignore them, it works without a hitch! So don't be scared by the messages.
Once Windows is booted up, it works without a problem!
On a side note, the card I linked to is officially "not mac compatible" but there is OSX drivers on the CD that comes with it!
Hope that helps!
This was tested on a MP 1,1 with SL 10.6.4 and Windows 7