In two steps: 
s|^(.*?)\s(\w+)\s(0000\d+)\s(\d+/\d+/\d+\s\d+:\d+:\d+)|$1,$2,$3,$4|;
s|\s(0000\d+)\s(\d+/\d+/\d+\s\d+:\d+:\d+)|,$1,$2|g;

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In reply to Re: Backtracking for substitutions by runrig
in thread Backtracking for substitutions by Anonymous Monk

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