http://www.wowinterface.com/download...LootReset.html

The above link is a good mod for keeping track of instance resets it was written quite some time ago and the last I used it was in 3.0 but it should still work just fine.

BTW smoooth I don't have the same problem you do if a char dies in the instance and has still gone over an hour of in instance time within the last hour he can get in on the 6th instance. If I have him outside for 10min and wait 10min inside before resetting for the 6th he gets in just fine. If I go out and reset prior to waiting until he has hit 60min of instance time he can't get in and has to wait. I just tried it and it worked for me...