Motion M1300 and Dell 2005FPW?

I'm finding myself wanting even more screen real estate than is provided by my tablet's display plus my external 15" flat panel, and lusting after the 20" Widescreen Dell 2005FPW (now available for $487 shipped). I'm concerned about this warning though:

To optimize this monitor's performance, your system must be able to support WSXGA+ resolution (1680 x 1050)

1680x1050 isn't listed as one of the supported resolutions when I go to Display Properties on my M1300. So I'm wondering, is there a way to get my machine to output the proper signal for this display?