How to install it:
1. Plug in your PSP with a USB cord.
2. Go into USB Mode on PSP
3. Download Sony PSP Live Messenger
4. Open up your removable drive that is your PSP.
5. Go to: PSP > COMMON (If you don't see those folders, you can create them)
6. Open up the downloaded Sony PSP Live Messenger.
7. Drag the folder called "SPLM" into "COMMON".
8. Done. You may proceed on how to use it and exit USB Mode.

How to use it:
1. Open up your psp internet browser.
2. In your address bar, type the exact following: (without the quatation marks)
"file:/PSP/COMMON/SPLM/MAIN.HTML"
3. It should now appear.
4. Bookmark it so you don't have to type in the address again.

How to change display picture: 
Click on the display picture (or sometimes shows up as a red x) and select your picture.

How to change username: Click on the username.

FAQ (Frequently Asked Questions)

Q = What firmware do I need?
A = Any firmware with a browser on it (2.00 and up) For the flash games, you will need 2.70 and up.

Q = Will this brick my PSP?
A = Of course not. Portals are 100% safe and PSP friendly.

Q = I need more help about Sony PSP Live Messenger
A = For more help, open the readme or open the help page from the messenger.

Q = I want different games
A = We will include how to change the games in the future readme.

Q = When I try to play a game, it says "Content cannot be Displayed".
A = Make sure you have Flash enabled.

Q = When I try to go to SPLM, it gives me "Content Cannot Be Displayed" Why?
A = It must be that you aren't typing the exact location for it in the URL address bar.

Have more questions? Come by our forums for quality support.
If you encounter any problems, contact me and I will try to help.

This was made by guitarplayer16
Special thanks to Qaz, for helping me on the display picture change and username change.