any way to modify grub from windows?

[David Fallon]

So, I'm trying to setup an environment where I can remotely control dual
booting machines, so I can remotely trigger which os (windows/linux) a
machine boots up in. I'm trying to do this by setting the default boot
in grub. Of the four possible configs (linux -> windows, linux -> linux,
windows -> windows, windows -> linux), the only one I have problems with
is the last one. So, my question is this: Is it possible to compile/run
grub with the cygwin environment installed (or in general, will it
compile on windows)? Alternatively, anyone have another suggestions? A
windows equiv. to grub would be great, as well - there seem to be a few
programs that will write to the MBR, but they all seem to be shareware.
Any help would be greatly appreciated....

-- 
dave