ah ok..i do not think that was too relevant
anyway to install in the Gimp portable is needed a simple workaround.
First download GAP here http://photocomix-re...ces.deviantart.
2 create a new folder,whatever is handy for you (in Document, or in Program Files, i suggest not on the desktop but only because there can be deleted by mistake.
Folder name is not important but i suggest something more clear then "new folder" (i.e i called mine GAP )
3 now run unzip the installer..in ythe installer you will see a default path something as C:Program Files/gimp-2.4
4 in the installer at right side of that path there is a search button
Use to find that new folder you have created, as result you should see the path change to point on that folder
Run the installer
5 now open that new folder , search inside, you should see 2 folder inside "plugin" and script...open the plugin folder
6 open the other zip you downloaded, the "bugfix files" , extract the 2 files and move them in the plugin folder you have opened
A warning will pop out asking if you want overwrite the files, click yes
7 well now is basically done, start gimp enter in File/Preferences/Folder there in "plugin"
Now there you should see a "new Folder" icon, click there, then click search the icon is "..." 3 points
Search for your new folder, and for the plugin folder inside.
Repeat same step for the script folder, again do not forget to click OK
Then you may just restart gimp and use gap
If you have some doubt on step 7 is described with more details and screenshoot here beginning-with-gimp-starting-tutorial-for-new-users-t34772.html
in the chapter Adding new things to GIMP