I need a part but dont know wtf its called...
 

I need something like a relay that has 2 positions...

when circuit #1 is connected the switch will be to position #1 even after its disconnected.

when #2 is connected it will switch and stay same as before...any idea where i could aquire this device?
and wtf it is called?

or how to build one?

sounds like a latching relay

also a

bistable flip flop circuit

I think flat5 is right on both accounts. If you're dealing with high-current, 12V-ish signals, then you want a latching relay circuit. If you're dealing with digital stuff (CMOS, TTL logic, etc) then you want a bistable flip flop circuit.

Here's a latching relay circuit I whipped up...this is probably what you're looking for:

<a href="http://www.djskaven.com/~skaven/yatta/latching.jpg"><img src="http://www.djskaven.com/~skaven/yatta/latching_t.jpg"></a>
Clicky for bigness

Note that my circuit assumes that you always have power. If you were in "circuit #2" mode and power to the coil was lost, the system switches back to "circuit #1". If you're looking for something that switches permanently even after power loss...I'm sure there's something out there that does that, but I can't think of one off the top of my head. I can imagine how to construct one out of a flap of steel and a couple electromagnets though...

Yes Skaven, I too had the impression that some latching relays are mechanically bi-stable.
Maybe have a magnet and and two electro-magnets? or a 2 spring system?
Or your bent metal idea.

Perhaps I'm dreaming :-)

Latching Relay did the trick, Thanks guys :)