When you select an option from the PXE menu, such as Full Host Registration and Inventory, FOG always uses the default bzImage. After a host is registered, you can specify which kernel to use for all tasks created and scheduled through the FOG web UI. If you have to manage multiple bzImage files for compatibility reasons, use the “Host kernel” setting for each host to specify the kernel that works best for that system. You can also group hosts, and update all host kernel settings for particular group of hosts. Just remember that groups in FOG 0.32 are a bit unusual. They are used for changing settings on all hosts in the group, but will not show your existing group settings.