Well well there is 2 ways to create emblems or logos in PES6 ,
You could create any emblem or logo u wish using the edit mode but it takes a bit time and talent.
As example here a self made Chelsea emblem :
http://img153.imageshack.us/img153/3163/chelseani0.jpg
There is tons of self made emblems via normal edit mode , you can check which emblems you want and create them yourself by looking at the picture , just choice the right colours and work pixel to pixel if you dont have a Max Drive. it takes surely time as i said.
Secondly , if you have a Max Drive its baby easy to import & export any kind of emblems or logos you just want or wish. You can also use certain programs to create or edit emblems & logos and then add them via PES6 Editor to your OF just as i did.
Hope it helped you a bit.
Cheers !!!!!!!