If I remember correctly (barring own 'senior moments'!):
You now need it when you have an 'un-IPK-packaged' App/com. file etc that you want to (re?) install on your device as an installable IPK file.
1). Make sure you have JAVA installed on PC.
2). Double click on 'Ipk packager.jar' file. (Sometimes I only got the header bar opening, so closed it & double clicked again). This opens the attached window.
3). Click on the 3 dots opposite 'Folder' to browse to your unpackaged 'com.' file.
4). Click on 'Destination on Device' to enter destination folder - can be on your PC.
5). Click on 'Create IPK File' and wait.
6). You should then get a message window: 'Package Created Successfully!'
7). Then - using WOSQI - drag that package from it's previous destination into the WOSQI window & click 'Install' (to your connected device).
(I have found that the packager works on 90% of App/com. files.. there may be a few, that for some reason, it can't handle/package).
Hope this helps restore your memories somewhat anyway!
PS. Here is the text from an old post here re. grabbing App/com. files from one device and re-packaging them as IPKs to install on another:
"..There IS a way to do this, at least on a phone (don't have a Touchpad so no idea if the paths are identical):
Obtain Jason's IPKPackager utility from ipk-packager - Cross-Platform webOS Ipk Packager - Google Project Hosting
Use Internalz Pro to browse to:
You'll see folders for each of the applications that you currently have installed on your device.
Tap-and-Hold on the desired folder, and COPY it to:
Afterward, connect the phone in USB mode and copy that folder to your PC's desktop.
Jason's IPKpackager can then be used to point to the copied folder and create an IPK from it, which should install from WOSQI *most* of the time.
I recently got a Pre 3 and wanted to have both it and my Pre 2 functional without the Pre 2 having it's Palm Profile wiped, so I created a new profile for the Pre 3 and was able to move applications from the 2 to the 3 in this manner.
I did encounter at least a couple of occasions where an IPK wouldn't install via WOSQI, but I then lucked out by copying the IPK to the usb partition on the phone and using Preware to install successfully.
Hope this helps..."