I’ve updated the current version of Event Popup Toaster to version 1.1.1. This changes brings support of Visual Studio 2008 and now it’s enough to have one installed instance for both VS’s (2005 and 2008).
To be more concrete – list of changes:

• The storage path of plug-in files was changed to

  %APPDATA%\Microsoft\MSEnvShared\AddIns

• AddIn manifest file now meet the VS 2008 requirements
• Some code cosmetic changes was made

Follow the link to download the new version of VS Event Popup Toaster for Visual Studio 2005/2008.