I wonder why there are no many users using fuelPHP or at least try it, 80% of world users uses Windows not UNIX, and no explanation on how to use it on a windows machine... bleh/
Installing Apache and PHP on Windows is outside the scope of this framework, and if you have installed it, FuelPHP just works, it doesn't need additional explaination. Lots of people use it on Windows on a daily basis, without any difficulty.
If you can't get it to work, perhaps you should tell us what you did and what didn't work, so we can help you?