Q: How can I add a custom icon to my projector so it shows my icon instead of the default Flash icon?

A: Windows

Resource Hacker or eXeScope are FREE tools that will allow you to modify any existing EXE file (not just Flash projectors) to change the icon, string resources, dialogs and more. They don't give you complete control of the EXE file, but they will allow you to make simple branding changes.

Resource Hacker http://www.users.on.net/~johnson/resourcehacker/ ($FREE)
eXeScope http://hp.vector.co.jp/authors/VA003525/emysoft.htm#6 ($FREE)

A: Macintosh

ResFool allows you to edit Mac resource files and bundles directly, displaying all the individual resources in the bundle, including those stored in individual files or in data-fork based resource files.

ResFool http://ljug.com/sw/resfool.html ($19.95)