I think that if you are going to all this trouble to get FN+F7 missing then you are missing the point of why it's not available - which is because you don't need it anymore. Windows + P does it much more simply, and even can tell the position of the screens based on which screen you plug in.
Although my Avatar shows me as a Lenovo Employee, which I am, I am not a support professional so any help I offer here is as a fellow user.
TermService: The service doesn't work and Fn+F5 doesn't work.
TermService: The service works and Fn+F5 work.
OS information: Microsoft Windows XP OS version: 5.10.2600 Service Pack 3 Processor: x86 Family 6 Model 14 Stepping 12 Memory: 3 135 852 kb BIOS version: 2.26 (79ETE6WW) Machine type-Model: 1951WU5 <- (T60)
Hotkey Features Integration for Windows 3.33.0002 (2011/03/25)