Wheelbuilding / Wheel Building / Wheel build help

1: Buy new rim identical to old one
2:Tape the spokes together where they cross
3:Lay new rim on top of old one, lining up the valve holes
4:Undo nipples and transfer spokes and nipples from old rim to new
5:Bin old rim and finish tensioning and truing

damn, wish I had taped them together first, I remember how difficult it was last time so I know I have a ball-ache on my hands now