I know in TextMate I can go to preferences -> advanced -> folder references and play with the regex pattern to remove certain types of files and folders by default.

I heard that if you have an existing project, however, and chance these, the project is not affected.

From a similar but different angle, I am interested to know if I can exclude certain types of files, say anything named "index.html" from an existing project while not changing the global scope.

Thanks!