The problem is, different people will play different types of hands.

e.g. If you see a player with 24% VPIP, they could be playing any A and any 2 broadway cards, or they could be playing

AA-22, AK-AT, KQ, Any connectors.

The first player is probably a fish but the second player could well be a smart solid player.

Until you have seen them play a few hands you wont be able to tell the difference.

If you notice someone is generally TAG then you can definatly start to assign a range to 17%VPIP, or 4% VPIP, or any of the other standard sorts of numbers. By far the best way to get reads and ranges on people is to watch them play and use pokertracker stats as a suppliment to your own specific reads.

Pokertracker is no excuse to stop taking notes.