PSP homebrew dev gdljjrod has released an app called Automatic Load txt version 0.02 for your PSP.  This plugin is designed to plugin help you load the right game.txt file on your PSP running CFW.  If you load a lot of different games then you will certainly want to check into this as it will make sure the correct file is loaded and disable other plugins that aren't compatible with your CFW.  Be sure to check out the dev notes as well as the changelog below.

Developer Note

If you have installed 2 CFW on your PSP, then at boot automatically load the CFW ME gameME.txt that corresponds to that version, so you can load some plugins what only work in this CFW, if after you pass the CFW PRO C game.txt now be charged for the plugins you’ve chosen for this CFW as PRO, gamePRO.txt

 

Changelog

• [+] Changed the plugin name: Automatic Load txt.

• [+] Now in theory can be used in more CFW: M33, GEN, TN, PRO and ME. (Please tell me if they work on these versions.)

• [+] Now the gameXX.txt loaded it automatically when you start the PSP.

• [-] Removed function rename game.txt

• [+] Fixed flickering errors (I hope that all is corrected in the CFWs).

• [+] You can run either on PSPgo like any other model. (no tested in Go)

• [+] Creation a .bin to store the last state/CFW has been detected.

 

Source