Upgrading Vista to 7 w/ XP

When Win 7 gets released in the next few weeks (my copy from HP at least). What will be the best way to install it and still keep my XP which is currently set to dual boot. I would assume that I would upgrade the Vista install with 7. Then do I follow the instuctions for "Installing XP before Vista" in the EasyBCD documents or will there be new documentation coming out?