I have 10 years of experience with Cisco Technologies on diversified areas, like Cisco Communications Manager, Unified communications, Cisco Unified Contact Center Express and Enterprise, Cisco Communication Manager Express, Cisco Unity, Voice Gateways, Cisco IP Phones 79XX, 78XX, 69XX, 39XX and SIP devices, etc. I have the CCNP Voice Certification. R&S advanced knowledges also (CCNP R&S).
If you are talking about the customization templates for buttons and services for 7900 series IP Phones, i think that the work can do on hours. But i need more information to determinate the scope of work and define an action plan.
Best Rgds.