I use macaroon for my macro's, never again have to worry about macro lengths.

As for the numpad -
I dont know what it normally does, if it does something, I unbound it. When I press it now however, in conjunction with the ftl keymappings, the only thing it does is send the appropiate movement keys to the then alts. So essentially, I haven't bound it to anything in WoW, and you can use any single key on yoru keyboard for this, ofcourse. The spread out macro is entirely constructed outside the WoW bindings.