wimboot from SYSLINUX menu?

[robinsmidsrod]

You have two options.

You can either go with native iPXE text-based menus. See http://ipxe.org/cmd/menu for docs and https://gist.github.com/2234639 for an extensive example.

If you want to keep your PXELINUX-based menu you can run ipxe.lkrn from a normal PXELINUX menu (it looks like a Linux kernel) and make it run your specialized script. I think http://ipxe.org/ has some docs for that too (try to search for ipxe.lkrn). Be aware that this last option requires the client machine to have native iPXE drivers, as ipxe.lkrn will not reuse the UNDI/PXE stack currently loaded.