Arguably the best Oshkosh Scenery for MS Flight Sim was produced by Ken (Retired USA ATC), some 10 year ago.
http://www.fs-mp.com/xxoshkoshyy/scenery/Oshkosh%20Airport%20Scenery%202011.zip
ENJOY
If you check out the Airport Scenery , on the road to the West of the North South runways, you should spot Hal, driving the Microsoft Golf Cart.
Geoff