EHP4 ACT_UPG phase taking a really long time

I'm still working on the EHP4 installation and for some reason the ACT_UPG phase in Step 5 - Pre-Processing, is taking a really long time, currently 7 hours and counting. This phase apparently "Activates ABAP Dictionary Customer Objects". I didn't think we had that many (relatively), in our system.

Just wondering how long this phase took for those of you who have gone through implementing EHP4? I'm running SQL 2005 on W2K3 all 64-bit on fairly decent hardware.

Thanks!

Tom