The values from the database are just used to initialize the config in FS-UAE Launcher, so you are free to experiment with the config options. You just change them to whatever you like. But the floppy_drive_speed and viewport options have no GUI controls, so you need to open "Custom Configuration". You should see the following there:
Code:
floppy_drive_speed =
viewport =
Just set those values (after you have selected the game entry) and close the dialog.
Unfortunately, there's currently no way to make those changes *permanent* (locally) for online database entries if that's what you wanted. But for trying out stuff before submitting changes to the database, this should work fine.