There's a RANT demo, so you can try it. I'm using FS2002 - i always used to think that it was rubbish, but i'm finding it very useful for practicing holds, procedural approaches, the ILS etc.
Best bet if you're on a budget would be to pick up a copy of FS98 for a fiver. The flight model is the same, view out the window is worse but you're not looking at that