The full-fledged GIMP package, with all the plugins and stuff, takes awfully long to load, and most those aren't really usefull for the standard MS Windows plug-and-play user (which I believe to be the target audience for most of the stuff in PortableApps.com). So, why not release a lightweight GIMP package with only the essential plugins and stuff? I tweaked the installation in my pen-drive, and now its load time is pretty decent...
Just to make it clear, I'm not saying the full package should be dumped. I just think having two parallel versions (full/slow-loading and incomplete/not-so-slow-loading), in this specific case, is really worth while.
I'm actually working on speeding the startup speed by directly altering the plugins config files. That way GIMP doesn't have to rebuild it (which takes a LONG time) on each launch... which will make the app feel lighter. This should accomplish what you want.. though there will be no reduction in installed size. Of course, it's under 24mb, which is pretty good for a graphics app.
Sometimes, the impossible can become possible, if you're awesome!
that's perfect! I agree, size is really no issue - it's the launch time that is annoying.
Thanks!