I recommend you guys to start patching kits into the game rather than using these one layered edits.
These are one of the earliest PES2008 techniques for kit editing and the number of kits you can import are very limited (up to only 9 i think) as well as the amount of detail that can be applied.
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http://www.pesgaming.com/showthread.php?t=53714
here is probaly the best patch availible from this site, but it has now been relinked to a different patch made german editors, there should be some instructions on the site.
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http://downloads.gamingaccess.com/index.php?cat_id=466
http://downloads.gamingaccess.com/index.php?cat_id=472
here are other places where you can patch your kits...most authors include instructions
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http://downloads.gamingaccess.com/index.php?cat_id=469
here are some extra graphic alterations you might be interested in, stuff like team emblems, and league emblems can be found here too.
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...and finally, the programs you need to make these changes
Game Graphic Studio version 7.4.0
and
AFS Explorer version 3.18
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Any more questions, feel free to ask...