Unfortunately not. In ISS PE2, Konami used a very weird file format (similar to TIM but it is compressed). However, a good friend of mine, Walxer, figured out how to change the kits by changing t he colour palettes. You can find his shirt editor at various ISS site.
No my PS2 is still in the box. I haven't got it chipped as yet so I don't know whether it would work. A guy called Haplo wrote an editor which you can use to edit the players names and attributes. You could then have correct team rosters as well as correct kits in the game. You could even replace the national teams with club teams. The possibilities are endless.