Ui, a deinterlacing patch, that would be terrific! At least getting of the black lines would help a lot. The real resolution of 320x240 is quite enough.
I have a German Privateer 2 (original discs) with dubbed video sequences. The sound quality is quite ok (comparable to VHS) and they used the original dubbing voices of the actors (I think, they sound familiar). Now I’m waiting for the deinterlacing release and then … finally after 17 years I can play through. :)