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This message has been edited. Last edited by: smiler_16,

Unfortunately you cannot increase the texture size of driv3r's vehicles.
Well I've never tried, because I've only replaced textures with textures using the same resolution.

Anyways you must use this tool to extract and import .dds files located within Driver 3.
SL Converter

If you have any problems or don't know how to use this tool, feel free to ask and I'll try to get back to you whenever I find anytime. (Could be a while, since I haven't even fixed driver madness yet )

for more modding information see
http://drivermadness.890m.com/viewtopic.php?t=154

look down at 15. Vehicles

Hope this helps