Help me clean up my Eclipse Projects window

Hi

I am coding projects in Eclipse Java.

I started with my main one, which is an RTS engine on my MacBook
It works, and I am now finishing a chess engine on my PC. It works, also, along with the RTS client.

I have been using the same src folder for all my work, saving code into sub-folders, and moving the one I want to work on into the 'src' folder.
But, when I do my demo to the honchos sometime soon, I don't want to look like a fool, copying the appropriate files into the src folder instead of using switch-workspace. - From one project to the other.
How can I clean this up? So that I use switch on my computer to go from RTS client on my PC to chess engine, also on my PC,in one click
and RTS server to anything else on the server machine?
everything seems to occur in one main folder in the projects window.
Shouldn't creating a new project create  new project folder in the package explorer?

Thanks