You can change the preprocessor keyword #region and #endregion in the "Font and Colors" section of the "Tools" β "Options" section ... but I never saw where you can change the text that you put after the tag.
You may want to poke http://blogs.msdn.com/saraford/ and check out your blog, as it is the queen of customizing the user interface for visual studio.
post it if you find it :)
EDIT: I found this on a Microsoft website; "You can only change the preprocessor keywords. To get more advanced formatting, you will have to look for third-party add-ons. I use CodeRush from DevExpress ( http://www.devexpress.com ) and it can do what you want. They There is a free version of Express, but I donβt know if the region coloring is in the free version.
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