The file "com.apple.LaunchServices.plist" in your Users Preferences folder holds some information of this nature but it looks too complicated to play with. I think what you're looking for is like what can be found in OS9 under the "File Exchange" Control Panel, correct? I'd be curious to know where all this is kept now, too? Coj Preston Kutzner <grdnwsl at mrichi.com> This is a sort of tangent from my last question RE: Thunderbird attachments in OS X. I was wondering if any of you OS X gurus on this list could tell me where program association settings are stored in OS X, or where a good place to find such information would be. I'm not as familiar with OS X as I would like to be, as it's not my daily OS, but I do have to support it. If anyone could point me in the right direction for some good, power-user/administrative information on OS X, that would be greatly appreciated. -- Preston