/etc/udev/rules.d
NameSizeModeActions
70-persistent-net.rules960644editdlrm
90-guest_iso.rules1340644editdlrm
Edit: /etc/udev/rules.d/90-guest_iso.rules (134B)
SUBSYSTEM=="block", ENV{ID_CDROM}=="?*", ENV{ID_FS_LABEL}=="vz-tools-lin", ACTION=="change", RUN+="/usr/bin/install-tools background"