Can you share some information about this IOS:
- CallGen - bulk call generator
- Pagent - Packet Generator
I don't know where to get these images and how to get the License Key for Pagent.
Questions like this should always be directed to your Cisco contacts (try the non-support channels, the always overloaded TAC team usually cannot help you). Even if I had the Cisco-internal information you're looking for, I'm bound by so many Non-Disclosure Agreements that I couldn't share it with you.