I just downloaded SpeedyFox 2.0.28.
It didn't find Firefox, Thunderbird, Chrome. But they are on E:
When I tried to create a custom profile by choosing a portable app's home folder, it could find nothing.
I have the apps installed without the portable apps manager.
It will automatically find the profiles on its first run if you have them all installed to the same directory (X:\PortableApps or similar). You can manually browse to to add them but you select the profile directory directly. So, X:\PortableApps\FirefoxPortable\Data\profile and similar.
Pro Tip: If you want to reset SpeedyFox Portable and re-run the automatic detection at first run, you can delete the SpeedyFoxPortable\Data directory.
Sometimes, the impossible can become possible, if you're awesome!
Many Thanks!