Dual Monitor Woes In Windows 7 Media Centre?

I've got two nice little 1680 x 1050 20.1" Dell S-IPS monitors, which are de-facto 16:10 units, mounted on an Ergotron stand, with the intention of using one for television and the other for computing purp's.My Graphics card is a capable Palit HD4850 Sonic with dual DVI outputs. It's also got an S-Video output which isn't in use.What I would like to do is run WMC maximised on one monitor, with TV there as and when I wish to view anything, and naturally I wish to use this screen maximised (the only issue in WMC is that there is a limitation of either choosing 4:3 or 16:9 ratio output, and not 16:10).However when I connect both monitors vai DVI output Windows7 locks my cursor in the maximised TV screen and I then cannot control the primary PC monitor whatsoever - which is somewhat of a complete farce, and is an extremely dissappointing result!Accordingly I have to drag the WMC display to get the 16:9 output to 'almost' fill the 16:10 monitor, and then face the annoyance of the cursor drifting to that screen from my PC monitor from time to time (I can happily live with a band to allow for the 16:9 ~ 16:10 hardware differential... but not this ridiculous loss of cursor control!)Question is this... why does my cursor focus get restricted to one screen if the Windows Media Centre is maximised? The whole point of having dual-monitors is being able to use both of them at once of course.I've tried with the ATi driver alone, and with the Catalyst suite loaded, with no differences to the issue.My monitors also have an S-Video input, but I've not got an S-Video cable to hand right now - however... if I were to use S-Video for one monitor would I avoid the 'locked in cursor' problem?