Good pointers for Cisco CP-9971

I’ve recently laid my hands on a set of Cisco CP-9971 phones. I’ve found a few sites offering .cnf.xml files for the phones, but it appears my current problem is a bit ahead of config file issues.

It appears that the version of software currently on the phone wants a set of .tlv files for “signing” the various configuration files and establishing trusts with the tftp server. While I can find several references on how to create these files for Call Manager, I’m having no such luck for creating them outside of Call Manager.

Has anyone gone over this bridge who might be able to save me several days/weeks of digging around?