Isn't the problem with "just adding the Select stuff to RISC OS 5" is that a lot of the changes have been to the core of the OS, so without those changes being made in 5, the Select features won't work. While it's not an issue in this case, the I believe the DHCP client in RISC OS Select won't work on a plain 4.02 machine - you need the other "behind the scenes" changes to support it.