Figure 8 cast on for 2 socks at one time on ML

[losnana]

I'm trying to use this method http://www.purlwise.com/2004/06/figu...st_o.html#more ro cast on for these socks http://webdesignsbybarb.com/tostetoe...eedletoeup.htm

Once i have the correct number of stitches on the needle ( in this case 12 on the top needle and 11 on the bottomm needle per the pattern) do I start the knitting with the bottom needle, knitting the stitches on the top needle, or do I need another needle to start, then transfer to the needles I'll be using? I'm sure I'm thinking this to death and it is obvious to everyone else.