As we all know, SA-MP 0.3.7 archives are packed. However, with the help of the IMG editor, I managed to unpack them.
They include: Accessories from SA-MP 0.3.7, Skins (Cops without a belt, Richie skin, and girl skins for state factions), Objects on the map, and so on.
I think this collection of files will be useful for MTA server developers, designers, and ordinary users.