Hello,
Simple:
- launch LiberKey menu
- launch a *.paf.exe
- start the installation process normally
Some wizards for the rest of the process will be displayed

You can still only drop all your portable collection to the MyApps LiberKey folder.
To get all these apps in the LiberKey Menu :
- LiberKey Tools
- Manage Applications
- Add / Remove programs
- Add applications => From "MyApps folder..."
Click on the first icon to install all applications