I knocked this little button up as I was getting annoyed at trying to open images in GIMP from within Picasa. It simply spawns an instance of GIMP with all the images currently in your tray. Unfortunately it spawns a new instance every time you click the button but this seems to be unavoidable at the moment.
Currently there is only support for GIMP 2.4 on windows, as I have yet to find a generic method of locating the binary without knowing the version in advance 
Choose either Online Installation or Download for offline installation.
Online installation is recommended for most users as it will open Picasa and install the button directly. Downloading is only recommended for Advanced users.
History:
Version 1.0 : Supports GIMP 2.4 on Windows XP.Spawns new instance of GIMP every time button is clicked.
2 responses so far ↓
1 Edit in GIMP from within Picasa // Jun 11, 2008 at 9:45 am
[...] More information can be found here [...]
2 Mark Geller // Jun 18, 2008 at 3:20 am
Hello,
Fyi, You should be able to use WM_COPYDATA and “detect a running instance” techniques to send images to an application window that is already open, rather than opening a new one, e.g., http://bcbjournal.org/articles/vol3/9911/Single-instance_applications.htm
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