Highway

Hi, Running into a problem with PXE on SCCM 2012 RC1. We installed SCCM2012 on one server, and using an other DHCP server. When installing / configuring PXE, the client does not boot with PXE. Changed the 066 option in de DHCP options, now it is responding, but it can't find the bootfile. Option 67 has to be enabled as far as I can figure out. But, and my question, what value must I enter here? Option 67 is the Bootfile Name. Think I have to enter the bootfile here, but can't figure out where it is located. Or am I doing something wrong? Thanks.