Original resolution - 720x408
New resolution - 960x544
Screenshots comparisons [Before/After/etc.]: Full album download (6 pairs of images)
Framerate Tests (408p without oclockvita/408p and 544p with oclockvita)
408p/Default- It's most often at 30FPS with ocassional dips to 28/29FPS, but Highland Cliffs especially gives it trouble, having pockets of 28FPS and dips in between a pack of cars. It can go as low as 25FPS.
408p/Maximum Performance- Menus are locked at 60fps with stuttering caused by loading vehicle or course models. Races are locked at 30FPS.
544p/Maximum Performance- Menus are at 60FPS with the same level of stutter caused by loading models, but the car preview is now in the mid 40s. I only found one dip to 29FPS across six courses, so it's otherwise locked at an evenly-paced 30FPS.
Steps to editing the eboot:
1) Open the game's eboot.bin in a Hex Editor (HxD, PSPad)
2) Search for the hex value "D002000098010000"
3) Replace the value with "C003000020020000"
You can read more about the process in the original thread - https://www.reddit.com/r/vitahacks/comments/637np7/problematic_psp_game_fixes_force_unleashed/