Run these commands from a ADB shell.
"wm size 321x428"
"wm density 160"
This makes the internal resolution of Android a bit higher.
The LCD is still 240x320, but you will have more space for your Android apps!
Shut down and restart your phone after, so your wallpaper returns to normal.
The boot screen will always be oddly sized, that's just the nature of what this tweak does.
"wm density reset"
"wm size reset"
This resets your Classic Flip's resolution to 240x320 at around 160 DPI