I've attached all 4 of my dual-cores to the project with no problem. Only odd thing I have going on is that one of them only has about 4 hours of work on it and will not download more. All of my computers are set up on the same "location" (in BOINC prefs) but the other 3 have the 5+ days of work I've instructed them to have.

Any problem or thoughts others are having while beginning this leg of the race, feel free to post here.