like how many feet for each range???

Should be possible, but not really recommended. Since it's an abstract distance system, you're pretty free to decide for yourself. Based upon what I've seen, I'd put something like this in place:

Engaged: 2-3 feet

Close: 4-80 feet

Medium: 81- 120 feet

Long: 120-450 feet

Extreme: 450- 1200 feet

Of course this makes for some strange movement rates, as moving from extreme to Medium range in one round means you just potentially ran 1080 feet for the cost of one Fatigue. This is why I wouldn't recommend this system, as based upon the weapon ranges they give in the rulebook, you end up with some really harsh consequences. You could set a base range of movement for each fatigue point, say, 100 feet, but that would greatly increase the effectiveness of ranged weapons. Think about how horrific Rapid Fire would be then.

To me, the abstract system is far preferable to a set distance system on a battle grid, and I really wouldn't change it unless you're wanting to do a full combat system overhaul.

http://www.fantasyflightgames.com/edge_foros_discusion.asp?efid=166&efcid=3&efidt=259452

Try this. I worked it up weeks ago.