Where did you lost?
Film City is best visited with aid of GPS set on Offroad mode. Once you enter Zekreet village (with Zekreet mosque coordinate) you can input the coordinate then follow the "recommended" staight line offroad route with judgment. From this you can detour to follow the existing paths leading to Mystery Village and Film City while maintaining the right direction as indicated by GPS offroad route.
The route basically will drive you past Old Zekreet Fort, then sway to beach route and then right back to rocky paths. It's about 12 km from Zekreet Village.

- Zekreet exit: 25 26’24.7″N 50 59’12.6″E

- Zekreet Mosque 25 29’07.41″N 50 50’48.22″E

- Our camping site: 25 35’13.1″N 50 49’45.5″E

- Film City: 25 34’41.61″N 50 50’46.65″E

- Mystery Village: 25 35’11.67″N 50 50’10.29″E

Check my travel story here: http://wahyuinqatar.wordpress.com/2010/10/09/zekreet-night-safari/