Re: Err guys...
If their super-secret expensive license IP can be stolen by black-box reverse engineering of their drivers, then it was hardly protected in the first place. Perhaps they should have dropped such things into a firmware blob that ran on the board itself and never interacted directly with the host OS. Sounds like they were hardly exercising 'due diligence' here. Maybe they just don't believe he could have gotten the cards working without stealing their code.
Problem is, I still do not believe that driver engineering is in any way illegal. Hardware companies have been obsctructive and unhelpful to open source developers, yet I do not recall and story about a driver developer being busted for 'IP theft'.
Has he stolen proprietary Creative code, which contains software licensed from a third party? No? All his own work via reverse engineering? Then probably the best they can hope for is to hit him with the DMCA or whatever equivalent is available, for circumventing their alleged 'protection measures'.