I'll second starting with some of the info in wowlazymacros.com.

That said, I'd recommend putting something together, trying it out, and then posting in the "New Multiboxers and Support" forum with questions about why certain things don't work. Also, see the WoD macro thread http://www.dual-boxing.com/threads/5...-Macro-Library and the MoP macro thread http://www.dual-boxing.com/threads/4...-Macro-Library and start there. There are posts in those threads that break things down by step and other considerations. If you've already been through those threads and are still stuck, let us know where you are stuck. We can help with "I tried the following <pasted_macro_code_or_isboxer_profile> and it sticks at <step_x>" but we really don't do much of the "I can't understand how to do this macro thingy" for you.