Unless you have six hands, I'm assuming you want several people to be able to edit source with different editors.
Of course you can do this - even if you do have six hands. I'm currently using Netbeans, Eclipse & Dreamweaver to edit stuff at work and Netbeans, Eclipse, Textmate and Textwrangler at home. No problems.
Normally, these IDEs will keep the config info in your home folder and the project data in the source folder. Not an issue because Netbeans will ignore Eclipse etc.
Likely problems are:
- auto formatting may differ between IDEs (tabs, how to format code blocks etc.)
- the possibility of several people working on the same file. This will happen whether you use different editors or not. Use something like Git or Subversion to manage the source code .
- They take up a lot of disk space.
- If you're using them at the same time on the same machine, they'll all want to grab all of the memory.
Wamp doesn't care what you do - it has no knowledge of the editors.
It's easiest to keep your projects in the htdocs folder of WAMP. This may be called WWW or Documents or Htdocs depending on your setup.
The editor plugins are editor dependent. Komodo won't care what plugins Eclipse has etc.
Of the IDEs you mention, I prefer the one you haven't - Netbeans. It's less bloaty than Eclipse. I used Komodo for a while, but Netbeans is just better.
Now I have to use Eclipse because I'm programming Coldfusion at work and Android at home. Netbeans won't do CF and struggles with Android.