splitting multi-tags but need some help

[aliasname]

Still seeking for a solution that I have software in use which would simply re-merge the appearance of multiple genres stored within seperated genre tags. Since so re-tagging isn't an option at all. It'll end up in an endless retagging for the one or the other software title.

Found a soltution, but it's a bit ugly, better said uncomfortable.
Goes like this:

Assuming an example tag would look like this:
GENRE:Acoustic Rock; Alternative Pop/Rock; Post Grunge

a small util converts that into:
@GENRE=Acoustic Rock; Alternative Pop/Rock; Post Grunge
=GENRE=Acoustic Rock
+GENRE=Alternative Pop/Rock
+GENRE=Post Grunge
which Minimserver handles quite well if added to a tagupdate.txt config file.

workflow at the moment
1. a minimserver rescan with trace enabled for the log since then containing lines like
...main: adding file tag GENRE=Acoustic Rock; Alternative Pop/Rock; Post Grunge
should I mention such a log is more but 3 million lines (~240MBytes) not that fast.
2. process the log convert the lines as mentioned above and add them to my tagsupdate.txt config
3. restart Minimserver

what I'm now after is a way to get a list of all GENRES minimserver came across on a rescan, separated from the rest of the log. anyone with an idea?