Power outage -> HDD Problem -> How to reinstall without disc drive?

Hi there,

due to a power outage the journalling of the hdd of the mac mini server running Snow Leopard Server is corrupt and repairing was impossible. I've got to reinstall the system now somehow, but the mac mini doesn't come with a disc drive. I tried to create a bootable USB stick but that didn't work for the server version of Snow Leopard. I really need help with this ... Any ideas?

Regards,

Dave