Given how handy Portable apps is and the fun you can have it would be nice if you could setup a drive with a given set of apps and then export a list so that you can send somebody the list file so they can get an updated copy without having to deal with downloading a frozen copy first.
This would help a lot with the Portable MakeHuman thing since Blender Gimp and some support tools need to be downloaded also for things to work.
triggering the install could be as easy as having the export file in a clean folder with the PAS installer
We're planning on implementing something like this. We're also adding the ability for apps to specify that they require other apps to function to the PortableApps.com Platform.
Sometimes, the impossible can become possible, if you're awesome!