There are some terrains from the real levels that are missing in the PSP editor, like the brown terrains in the Crystal levels and the red roofs from the Roman. You will have to use something else for that brown terrain, like the rocks from the Fire style.
I found a video of someone that has ripped all the PSP levels and is playing it in Lemmini:
https://www.youtube.com/watch?v=9ER_KrPdS6o It's not what you guys are looking for though. Maybe you can ask him to rip the editor pieces?
You can download the rips here:
https://mega.co.nz/#!OYtQBZbY!C0MXxi7X2-cZmAChkU6NcWQgsz1jzD_TMMcHD4ExV5IWhat I'm shocked about is that he even made rips of some of my Sega level remakes.
He must have downloaded my Sega levels here:
http://www.lemmingsforums.com/index.php?topic=799.0 Room with no exit
Under Construction
Let's go to the moon
Where do you see Lemmings?