OK, here's a trick. If you have hack templates installed into the default templates, you will lose them in the upgrade. Unless they are modified. If they've been modified they will move to custom templates. I went through my vBStats, Contract Posts and vBLinks templates and modified the ones I hadn't touched. I added some junk and then took it out. I did NOT revert them. Then when I upgraded my real board, they all got moved to custom templates. If you combine this with hacking the PHP files according to PPN's instructions (be very careful if you have a hack in any of the modified code), you will have no problems.