remote control of dual boot

[Stewart Nelson]

Hi,

I have a conventional dual-boot system:
Win XP on IDE primary master, grub in MBR,
FC2 on primary slave.

If either Windows or FC2 is running, I can
access it with VNC.  Of course, a reboot will
switch to the default OS, if the other is running.
However, I don't know how to switch back.

Is there a good way to boot FC2 from Windows?
Or to boot Windows from FC2?

If not, is there an easy way to edit grub.conf
from Windows, so I could change the default to
Fedora and then reboot?

Thanks,

Stewart