I have "programmed" isboxer as ualaa described..
my dps macro is the following
/stopmacro [channeling]
/castsequence my full dps rotation

now first on mobs i just want to aoe with my slaves. my dps and tank key are at the same hotkey which is "1"
so if i push "1" while i'm doing the channeled aoe (hurricane) my hurricane just stops and begins with my /castsequence rotation..

how is this possible, i got that /stopmacro [channeling] thingy