Two monitors, one landscape, one portrait?

Can I take two monitors, one an Apple Cinema 20", the other a Dell 1703FP, connect them to the two DVI ports on my MacPro, and have the two monitors with different rotations? I want the Cinema display in standard widescreen mode, but I want the Dell to be in portrait mode. I can't seem to figure out how to rotate only one of them.

Any help appreciated.

See below for my hardware specs:

ATI Radeon X1900 XT:

Chipset Model: ATY,RadeonX1900
Type: Display
Bus: PCIe
Slot: Slot-1
VRAM (Total): 512 MB
Vendor: ATI (0x1002)
Device ID: 0x7249
Revision ID: 0x0000
ROM Revision: 113-A52027-140
EFI Driver Version: 01.00.140
Displays:
Cinema:
Display Type: LCD
Resolution: 1680 x 1050
Depth: 32-bit Color
Core Image: Supported
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported
DELL 1703FP:
Resolution: 1280 x 1024 @ 60 Hz
Depth: 32-bit Color
Core Image: Supported
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported