How do you get the EmotionSoiD app to load the BIOS?
The app is most likely asking you for PS2's original BIOS files. Usually BIOS files are copyrighted by the manufacturer, and are illegal to distribute.  You will have to do your own research on how to obtain them.

Your best bet of getting developer's support is over at their SourceForge site, which seems to be the origin of the app.