When I try to hack doors and turrets like in the training it does nothing like it stops the scripts of the games once the hack has complete, it wont recognise I have completed the hack. Have a feeling it has something to do with changing interact (F) to a different key if that's true ll let you know, im at work at the moment.

Yes it's exactly the problem you described. I just had to leave my interact button as default and then things worked.

That is the work around - go to a default key map and everything runs fine - remap and things get hosed, something Crytek needs to fix in the next patch.