[Grml] how to enable boot from hd after timeout?

Hi grml users,

I remastered the grml cdrom in order to backup a windows computer.

It should boot Windows form hard disk if the user does not hit any key within a certain amount of time. This is necessary in order to enable remote administration of the windows computer even if the cd rom is in the cd tray.

There is this statement:

ontimeout chain.32 hd0 0

in isolinux.cfg but instead when the countdown reaches zero one hears a beep and the count down beginns again (for 100 seconds).

chain.32 is in boot/isolinux as is isolinux.cfg.

Any ideas on how to achive boot from hard drive when no key was pressed?

Ciao, Gregor