Of course there would be a 3D program that could edit them, they had to be created somehow. However, you would need the source to the game, and the programs used to create it. It's not just a matter of popping the PS2 disc into your PC and copying model files. It's not going to happen.
yea, alot of companies create there own 3D modeling programs so that the models arent accessable. And even if you extracted them, you wouldnt be able to get them in ESF. And alot of them use wierd compression formats, its almost impossible to get through to, you would have to work for Atari to be able to "hack" into the disk.
they dont extract from the disc, its a one way system to stop people ripping models, they compile them into a single file, which inside are the single compiled models, which no decompiler exists to read or export to my knowledge. the only thing ive had success with is sounds, even then you have to work your way though thousands and edit the speed/pitch to get it right ;O