Install NCM trial on a pre-existing NPM server

Hi, I have a pre-existing NPM deployment working very well and monitoring approx 100 nodes. I would like to run an NCM trial to see the product and the integration with NPM. Bit concerned that should we choose not to use NCM (unlikely i know!) that it will be a pain uninstalling it without affecting NPM in some way... has anyone had any experience of this?

thanks