mastorofpuppetz: Thats not what he said, again all Cd project had to do was:
extract this massive file and make this extracted version the base version in steam.
This is on CDProject not steam, all devs do this so the downloads are small. Maybe where steam competes with GOG they did it on purpose.
No excuse, this is just lazy on their part, not 1 single game has done this, and I have a lot in my steam folder.
Christ, are you on a crusade or something?
a) you're wrong: other games have had this happening before but Witcher 2 is one of the first games to have a pack file this large. Many split them up according to textures, sounds, music, etc. You can argue that they should have split it up in smaller sizes but you can't claim not a single game has done this because it's not true - a lot of the time I have updates of several GBs on Steam.
b) if you knew how the mod system works, it's by putting the files in the sub folders. IF they had done what you said they should do, you'd effectively killing the mod community, WELL DONE! *rolls eyes* If you don't get why: if all updates files are only available in their extracted form, any mod overwriting them will mean that the original file is GONE. Right now, containing it all in a pack file, means that it's 100% safe to use a mod since the original files will always remain intact. Also, during patching, because of the mod files, you could see problems updating because the installer might go "wait a sec, these files aren't originals! Maybe you got a newer version of a patch already!" and abort. Good luck then!
In short, don't talk from your ass and think things through. Putting the extracted files out would cause far more issues - and this because of Steam which uses a ridiculous update system.