Silente,
Under the feed settings you will find an option for changing ID3 tags. I think iTunes uses that list for managing any iTunes podcast subscriptions so I don't think you can add things to that list. You can use a smart playlist to collect things or you can use the options under the sync profile to sync podcasts to playlist based on genre or feed title.
As for the hf.dat file, if it's not on your iPod and you're either using the most recent iTunes or the newest firmware on your iPod that may indicate that Apple has changed the underlying libraries. I'll have to recompile if that is the case. I'll try to do some testing over the next week and let you know. Sorry I can't get to it sooner. I'm slammed at work.
Regards,
Will