I used to run 2 monitiors flawlessly on my ti4200 using both the Analog and DVI outputs, on first start though only the Analog output would work I have to change the display settings in windows xp to use the DVI output as well, it was pretty easy though only took about 5 min to do.
I am currently using a Radeon 9800 Pro with 2 monitors and had to change the display settings in windows as well on this one to get the DVI output to work.