You can use the x and c Axis to pocket mill.
I find that pre-machining with a different tool or drill first helps.
You can mill a tight limit bore this way and it gives you a good pcd.
Program your co-ordinates in (you may have to use the centre of the cutter).
If your machining a circle or an arc and you want to change the size, try changing the radius in the program slightly.
I know this is a bit vague, let me know how you get on. If you can,t get it to go i'll give you my email address and i'll give you a program example.