Please help hack for pioneer SDV-P7

From Portsmouth, 1 post

Can anyone help me? I have got a pioneer SDV-P7 incar dvd player. When on holiday i brought one cause it was cheap, then realised when i was home it only plays region 1 discs. Does anyone know of a way to change it to muti region by a code or chipping it? Can anyone help? I have looked on the web but can only find codes for home players.

Thanks

Dave