Answer: YES! :D
System: AMD Athlon 64 3500+ Winch., ASUS-A8N- SLI Mainbaord, 2x XFX GF 6800GT Graphic adapters in SLI Mod. Resolution 1600x1200 32bit, 4xAA, 8xAF.
Only with the graphic adapters ForceWare driver 67.66 will Lock On at present supports!
Green party bar left on picture, are only to demonstrate, that both cards work synchronous. The strip In the centre shows in the test image at, when the two screens jointed are.
greetings