I could sit here and try and recite my knowledge of VORs, but rather than risk getting it wrong, and also to save some time, heres the Wikipedia definition http://en.wikipedia.org/wiki/VHF_omnidirectional_range
It also shows how to use one.
Now, are you OK with all that, but dont know how to do it in flightsim, or does the whole concept confuse you (dont mean to sound condescending- I didnt understand them very well for a while).
Also, do you want to track a particular radial to/from the VOR, or do you want to fly to the VOR on whatever radial is appropriate?
Hope this helps