Please excuse me for asking some noob questions.

1) I've updated my copy of Fallout to version 1.7, but apparently, the GECK has only been updated to 1.5. Will that cause any problems?
2) When I tried to install the program, it told me I was missing a file: libvorbisfile.dll
I can't even start the program. Can anyone tell me what this is and where I can get it?
Thanks very, very much. I've been wanting to use the creation kit for a long time, but I can never quite seem to get it started.
-- NoobNoobNoob