Does anyone know if the adventure editor is available in the GOG verson? If it is, I am not finding it anywhere. Also... is there a windowed mode for the game itself? Thanks!
Oh yeah... I am usuing a mac! Thank you!

Yes to both questions. Djinni is located in your witcher/system folder and will be listed as djinni! with a picture of a genie`s lamp beside it . For windowed mode Click launcher>options>advanced and I think it`s under the video tab, just uncheck the full screen box and click accept.

Thank you for responding!
Actually, one more thing... I am on mac. Does that make a difference, because I'm still not finding the editor or the windowed option. Thanks in advance.

Neither Tommy nor I have a Mac, but whether it's Mac or PC affects only the upper levels of the organization of your Witcher files. Once you've located your Witcher files, djinni.exe should be in your System folder, like this:
http://i243.photobucket.com/albums/ff199/Bloodhnd/djinni_zps88162e26.jpg

So, wherever your Witcher's program files are on a Mac, you should have four folders inside it: Data, Launcher, Register, and System. Look inside your System folder, and there should be some subfolders and some files, of which djinni.exe should be one.

Thanks. I actually pm'd Tommy and he was saying that the editor and the windowed options are NOT in the Mac version. Thanks for the response, though!

I have a problem, the error is in danish so it might not be perfectly translated by me but it says it's missing the hc.dll file. Care to help plz?