Thanks a lot for your time tompo.
Can you be more specific about "if hit me and you" ?
I'm no expert and i can't make that kind of deductions yet :S
Can you translate the "if hit me and you == rocket" into real example code?
Thanks a lot!

I've come with:
if(you==xlander && event_type==Event_impact)
{
Crash_Detect.string="COMET COLISION DETECTED";
}
Works great, but after the collision the if condition is always true, even when there's no colision at all.
A way to "reset" the "event_type"? the "you"?

Thanks.