Fanjita has updated his very popular and easy to use eboot loader which allows homebrew to run on your PSP with firmware version 2.0. If you do not want to downgrade every time to run homebrew then this is the way to go. Please note that not all homebrew will run using this program, but the list grows with every release. Fanjita writes about version 0.8.5: “

With this release, and probably for the next few, the focus is on adding extra supported applications and new techniques to the loader. As a result, a few apps that used to work will probably be broken. I've taken the decision to just live with that, and fix everything up in a couple of releases' time, because attempting to fix up newly-broken EBOOTs is too time
consuming. Every release from 0.8 onwards on is capable of working unaffected alongside previous releases, so this shouldn't be a big deal.

Important changes in this release:
- Introduced a configuration file, to allow tweaking of EBOOTs by end-users. See loader085.cfg for details.
- Improved kernel-mode override patching logic - makes a lot more apps run.
- Attempt to kill surplus system threads, for stability.
- Run loader from reserved memory for increased stability.
- Tidied up some memory reuse in ELF section header handling
- Bundled graphical menu now filters to only display the names of EBOOTs for selection - all the surplus fluff is hidden. Also now handles v1.5 kxploit-style homebrew directory structure.
- Added option to allow L+R+START reset to go back to loader menu, rather than main menu.

New supported EBOOTs:
- SNES9xTYL 0.2c
- TCGS Car
- ASTC (Another Silly Tetris Clone)
- Moppi's Flower Demo
- Tail Tale
- Scrabble Assistant - loads but hangs?
- PSP Revolution
- Heretic PSP
- SMS plus 1.2
- Crystallise 1.0
- Binary Clock
- A-Blit demo