chemosavi has used a home made hot box (oven) to change the shape of an old litewave board.
i believe he was happy with the results.
if your board is more 'thermo-plastic', as opposed to 'thermo-set',
it may work for you.
it was more than one year ago, but you could ask him or search the old posts.
http://www.kiteforum.com/phpbb/viewtopi ... ght=rocker