Open the folder; it should look like this (without the colors and annotations).
Drag the Inkscape.exe (not Inkview.exe) icon to the DROP EXE space, but do not click the CREATE! button. Click Advanced Mode... instead.
Add files and folders to the appropriate PackageFactory folders as marked above and go back to the Summary tab.
Click Create a U3P File... and be prepared to wait while it packages the application. Save it to your desktop.
Add it to your U3 drive from the Launchpad's Add Programs (Install From My Computer). Expect it to take up to five minutes; this ends up using over 200Mb on your U3 pendrive.