Moving the camera

i followed the three 3D tuts you have in your contents:
ms-help://MS.VSExpressCC.v80/MS.VSIPCC.v80/MS.XNAFX.1033/XNA/GoingBeyond_ContentPipeline.htm
ms-help://MS.VSExpressCC.v80/MS.VSIPCC.v80/MS.XNAFX.1033/XNA/GoingBeyond_Input.htm
ms-help://MS.VSExpressCC.v80/MS.VSIPCC.v80/MS.XNAFX.1033/XNA/GoingBeyond_Audio.htm

and they were very useful.. but now i want my camera to follow the ship around staying just behind it.
ive looked at a load of websites but i just cant make the connection on how to do it, it always messes up :(

Something about transforming the cam coords with the rotation?!

Any help would be appreciated, cause im lost :((