In ConfigMgr 2007 it was needed to deploy both Boot images to SMSPXEIMAGES$ for OS Deployment. In ConfigMgr 2012 this method is not available anymore. Adding the bootimage to the RemoteInstall folder is now an option in the bootimage properties, named "Deploy this boot image from the PXE enabled distribution point".
After selecting this option, bootfiles will be available in the RemoteInstall - SMSBoot folder automatically. Hope it helps!