LR4 - move catalog and photos to external drive?

After posting I may have finally found some useful video and information

http://www.youtube.com/watch?v=-avHtI84fQ0

http://laurashoe.com/2008/12/10/how-to-move-your-lightroom-catalog/

Looks like I should move my photos first from within LR

then move the catalog and relaunch from the moved catalog

I think Ill back everything up first

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warning: I enjoy photographing my cats