Getting errors related to during unattend.

Hi All, I'm testing an unattended install of 2012 server core and I'm getting errors during package install. I looked at the autounattend file and under the sectioncpi:offlineImage, the value for cpi:source= is the path to the local install.wim that I'm using to build the file in Windows SIM and, of coarse, the installer is looking for that and can't find it.

Am I missing a step in Windows SIM; Am I supposed to click somewhere and the reference will be changed to the default location on the DVD?

Can I just remove the reference and the install will look in the location on the DVD, or am I supposed to add a reference myself?

Thanks again for your help.