We are looking to migrate off our existing server 2003 sp2 machine, running RIS (which I know is WDS as of Server 2003 Sp2, but to be clear..) with a bunch of legacy RiSETUP images to a Server 2008 r2 box.

Because the change in architecture (x86 to x64), and a limitation of the Server 2008 upgrade path that won't allow mixed-mode WDS services to be upgraded, I am forced to look at running Server 2003 for RIS and Server 2008 R2 for WDS for Windows 7 on the same network.

The problem I'm facing is how to deal with both PXE services at the same time? I'd still like the existing RIS server to be available for production use, but start working on WDS for deploying Windows 7.

Is there a way to have a sort of PXE "chooser" ? Or some other mechanism to be able to select which server the client should download the boot image from?

Thanks!