voila la solution:
5. HOW TO PREPARE KITS
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Step #1 is to download a kit.
You can use pretty much any PES4 kit in 512x256 BMP format.
( Which is how all major kitmakers - Spark, kEL, biker_jim_uk, and others -
distribute the kits).
Step #2 is to set proper transparency for the BMP palette.
For that, you can use WE/PES Graphics Studio v04.04.24 by obocaman.
In the right section ( "Bitmap Info"), open your BMP, then set all the
colors to be opaque. After that, in palette, select the color(s) that
you need to be transparent ( usually some bright green or pink), and
set its opacity to 0%. Save the kit, by right-clicking on it, and
choosing " Save As" menu item.
voilà, dsl par contre elle est en anglais, le passage qui t´interresse commence a partir du step #2, il fo regler la texture alpha de ton bitmap avec le logiciel Graphics Studio!!
j´espère avoir été asser clair et que ça pourra t´aider!
ciao