Dagless, what I believe Eiii is suggesting (and what I am for sure suggesting) is the exact same jersey we have now, except where the neat looking 'dp' is, there would be a white area, very small, but small enough for some type of logo. Checksum on the jersey would remain the same, however the logo would NOT be checksumed, therefore clans and players could change them as they wanted.
-y00tz
Extension: For example, the skin as it is now would be split up into skin_unmodifiable and skin_logo where the 'dp' is now, would be saved as a separate .tga to be overlaid on the model, if this is even possible considering skm and md2 texture constraints.