What about a tiny Program showing this barcode right on the client's screen?
Try this
![Smile :-)](./images/smilies/icon_e_smile.gif)
Hint: we use the MAC address to generate a unique OPSI Hostname, which will not change during OS install or network boot, instead of relying on the user's ideas what her host should be called.. But: we have the COMPUTERNAME aka HOSTNAME environment right at hand, so feel free to change it. Use the source, harry
![Smile :-)](./images/smilies/icon_e_smile.gif)