I was lucky and got a PSP for christmas with Madden 06 but it errors with "The game could not be started. (80020148)". My girlfriend's son also got one (so we can play against each other) and his Madden game works in BOTH of ours. They are both running v2.0 and NO, I have no loaded anything else on there like homebrew or anything else that I found while searching for this error.
Here's a list of what I tried and still did not work:
1. Formatted the memory card
2. Battery is fully charged and PSP was plugged in. (read that somewhere and don't understand how that helps)
3. If I boot with the working copy, exchange it with the broken copy after its done loading and the game works just fine.
4. This only happens with Madden 06. I've exchanged the game twice and still no luck. The other games we have, Burnout, Lumines, and NBA 06 all work fine.
My conclusion: EA sucks.