Instructions
Point Firefox to the site of your favorite flash game on the computer. Once you find your game, right click on the website (not the game itself) and click ̶0;View Source.̶1; Hold the ̶0;Ctrl̶1; key, then press ̶0;f.̶1; Search for the ̶0;.swf̶1; file and copy the URL.
Download the game. Paste the full URL of the game into the address bar, and you should see the game in your browser full screen. If this doesn't work, make sure the URL you entered is correct. When you see the game at full screen you can save it to disc by clicking ̶0;File,̶1; then ̶0;Save as̶1; in Firefox.
Plug your PSP into the computer, and create a folder for your game, such as ̶0;games.̶1; Drag your downloaded game to this folder.
Unplug the PSP and point you PSP's browser toward the game̵2;assuming you put the game ̶0;awesome.swf̶1; in the folder ̶0;games̶1; the URL is ̶0;file:\\games\\awesome.swf̶1;. Be sure to add your games to your Favorites after you get them to load to avoid typing the URL every time you play the game.
Note that the URL here assumes all files are in the same ̶0;folder̶1; as the web page itself. So, for example, if the website ̶0;www.awesomegamesthatrock.com/games/rock.html̶1; references a SWF file named ̶0;rock.swf,̶1; the full URL of the SWF file is ̶0;www.awesomegamesthatrock.com/games/rock.swf.̶1;
Consider renaming games with long filenames so they are easy to find; for example, rename ̶0;awesomestgameinhistoryofearth16435.swf̶1; to ̶0;awesome.swf̶1;.