All you need to do is cut the end off of the x1 slot. the x8 adapter will work in it
Realy?
I dont want to go damaging my mobo slots for nothing here

It can be done. The other option is to cut the "fingers" of your PCIex8 extender with a dremel tool so only the PCIex1 "fingers" remain. Wrap the cut portion in electrical tape.
A mistake there only ruins a $10 extender.

Ye thats what i did

, well i didnt have adremel to hand so i used scissors very carefully
its working , what i dont get is why cablesrus are selling them for $8 mor ethen the 8x to 16x types :/