You'd have to really take the WAD file out of the equation, like I'm sure HL uses the same premise as Quake, where the games data is stored in a massive WAD file - which is really the whole game, so if you don't distribute that, and people have to provide their own, then it should have the same legal standpoint as Doom ports, or HexenDS - which works like this. Really if it was so much of a problem, then there would be no Doom or Quake ports, no HevenDS, no Quake on the Dreamcast, that would royally blow
.
But I don't know why you'd want, or need to convert the BSP's to quake BSP's. If you don't have the HL source code, then you can't port it, you certainly could'nt fudge it together using Quake 2 source code, don't waste your time if that's your plan. For one thing, that would be illegal - to stay within the legal boundaries on this one, you need to use that WAD file, unmodified, with no copyrighted media outside of it. Most publishers are ok with ports, as long as it relies on original copies being owned. Note that ID Soft games are ported frequently to all manor of platform, but only ever with the shareware WAD, never the full version, in their eyes the WAD file is the entire game, everything else is platform specific.
''Stick that in your text and scroll it!.''