id suggest reading the macro wiki article its very helpful. there are a few ways to set up targeting and you need to do some research to decide what will best suit you. multiboxing is a complicated thing at first but i for sure recommend figuring out as much as possible on your own. i spent 3 days looking at everything in the wiki and searching threads before i even started my trial account. i multibox pretty good and i dont believe ive ever had to ask a question. im not saying it to discourage you or for you to think we hate "noobs" or whatever im just saying it to assure you that everything you could ever need to know is already here. we'll help when we can but i think its much more gratifying to figure it out on your own. also keyclone is really really helpful.

check that link though it may help. pay especially close attention to the assist macros section. it explains the many ways to target things.