I've tried to resolve my problem using the "-p" option. However, it doesn't work :
/opt/drbl/sbin/drbl-ocs -b -g auto -e1 auto -e2 -r -x -j2 \
-p "/home/partimag/script1; /home/partimag/script2; /home/partimag/script3" \
-h -l fr_FR.UTF-8 startdisk restore 2011-10-24-img_debian508_vz_base sda

My client displays the grub-like menu, and I get a menu "Entre shell / Start Clonezilla". When I don't specify the "-p" option, I don't have this problem.

Any idea ?
Thanks for your help,
Grégoire Leroy