How to add lines to Xsetup, Xstartup

[Valentijn Sessink <valentyn+sessink@openoffice.nl>]

Hi,

I just completed my very first .deb, for a tiny utility named "xreboot"
(sits in the lower left corner of the screen on the xdm login with a
[reboot] and [shutdown] button).

Now the only thing that's missing is a way to start xreboot from
/etc/X11/xdm/Xsetup and kill it in Xstartup. Is there a way to do this?
Or should I just leave this as an exercise to the user? (AFAIunderstood
one is not allowed to play around with other packages' config files, so
I won't try that ;)

Best regards,

Valentijn
--