Well, i replaced the o2 sensor with a new one and the CEL light has disappeared now.
As it idles fine when cold, i thought that would have solved it at first.....but it hasnt, as soon as it had warmed up it started hunting again.

I then borrowed a friends idle control valve off his car, and it still does the same thing, i also checked the pins where the correct way round in the plug (they were the wrong way, so fixed that)
I then removed the throttle body, and cleaned all the vaccum channels etc out, again didnt solve the problem.

The flat headed screw on the intake manifold (IACV screw??) has been moved from STD position when it was turboed, a friend says that has a affect on the TPS, as it reads voltage from the TPS to start using the idle control valve.

Im gonna check the voltages tomorrow, and make double sure all vaccum leads are not leaking tomorrow.