mmm...
dont think he is anymore here.
I feel tired after this weekend and nobody can stand longer than me...
well, he comes one time zone later.

what comes to the log-file, I suggest you go with simpliest option, ini-files.

read the docu about readprofilestring and writeprofilestring...

in your case, all you need is writeprofilestring.
make a empty file in somewhere and give every one write or change rights to it...
then just make the logonscript do writeprofilestrings for key and values.
key could be wksta-name and values... well, you know what you need. like the mac-address-
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