Another alternative is combining this "hack" http://talk.maemo.org/showthread.php?t=25010 plus either Personal Launcher or Personal Menu.

First backup the original SWF:
Download some .SWF Flash games into Nokia N810>Games (actually is /home/user/MyDocs/.games)

You need to first create a "clear last game" launcher (for some reason Personal Launcher doesn't support "&&" command chaining.

• Desktop>Menu>Applet Settings>Personal Launcher
• (+) Add Command>
• Type in a name for it: Clear SWF
• Command to execute: rm /usr/share/tutorial-applet/N800-tutorial.swf
• Check "Run as root"
• Select an icon

So you create a flash game launcher by

• Desktop>Menu>Applet Settings>Personal Launcher
• (+) Add Command>
• Type in a name for it: SuperMario SWF
• Command to execute: ln -s /home/user/MyDocs/.games/SuperMario.swf /usr/share/tutorial-applet/N800-tutorial.swf
• Check "Run as root"
• Select an icon

http://www.box.net/os2008/1/38267058/393255068/1

(Alternatively instead of having to use a "clear" command each time you switch games to get rid of the symlink - you can substitute "ln -s" with "cp" to copy the SWF each time)

Select the game's newly created icon.
Now just click on the "Getting Started" applet on the home screen.