SCCM 2012 R2: PXE on different server, which WIM to use?

Hi,

We have SCCM 2012 R2, however the PXE is a different (existing) server from which we deploy os-es already.
We'd like to deploy also SCCM 2012 R2 images by importing the WIM to this PXE-server (which is not the SCCM 2012 R2-server).

This are the boot images, correct? If so, any special recommandations to do this import?

J.

Jan Hoedt