QA Bug Reporting

I've inherited part of my company's QA process, where testers report needed modifications (not bugs) or ides for future enhancements for our web-based product.

The existing system, is to have the tester screenshot the item, print it out, add notes, and put it in a folder on my desk. However, when I go to prioritize and track lists, I don't have the original screenshot.

We have an internally built bug-reporting tool that allows for file uploads, but it's already overcrowded and confusing.

Can anyone recommend a tool, book or process to help me figure out how to manage this better? Thanks.

Here's an open source solution I use for all my freelance work.
http://www.mantisbt.org/