If you mean the PES3 Ultimate Update disc then, no, it does not contain real flags and kits. The only way you can get these things is by patching your game with one of the numerous patches that exist. This requires a little bit of computer knowledge plus a CD burner, a ripped copy of PES3 on CD and of course a patch.
Oh, and you need to get your PS2 chipped/modded to be able to play the finished product.
Hope this helps!