CN is not ready yet for full notebook switching, but you can make do by renaming or copying your notebook.dat file, present in the CN program folder -- so for instance, you could have a notebook.dat.snip file with your code, while using a regular file for "something else", then you would rename it to notebook.dat.misc and after remove the '.snip' from the other file to access your code snippets (remember to close CN before doing this).
A batch/script could automate this process, but a better and easier solution is to use tags to differentiate note purpose -- so you'd have 'code' for some, and 'misc' for others. There are some posts with really good note organizing methods here at the forum, if you just search for them...
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