Integrate CI app with PyroCMS (or other CMS)

[eluser]starsinmypockets[/eluser]
I'm working on a web app using codeigniter and realizing that I need some other functionality that could be gracefully handled by a CMS...

I recognize that I'm perhaps working backwards - maybe I should have started with a CMS and built the app onto but, así es...

Any thoughts on bolting a CI app together with PyroCMS or another existing CI CMS?

Any thoughts appreciated!