afps vs mfps

[onlypars]

Just found this site and am thrilled to join. I have some questions about setting up a 1dMk2N. I would like to use the * button for af initiation. Does this provide af lock too? Also, is afps automatically set? If not, how do I set it up? I would like to use the X button to switc to two manually picked focus points. How do I do this? Any links to these questions or an explanation on how to set up these functions would be greatly appreciated.
Thanks in advance for all your help.