WM11 to iPod tagging problem?

Okay here is my problem. I know it's a little anal by it's bugging me.

I have a 30GB IPOD Video. I don't care for iTunes so I am syncing it with Windows MP11 via the plug in on this site: http://www.mgtek.com/dopisp/

Since I was home with a sick child today I used that time to finally finish ripping my CD collection that spans 20ish years. I then did the best I could getting all the artists to match up etc. The problem I am running into is the iPod seems to get the "Artist" information from the tag "Contributing Artist" instead of the tag "Artist". Why is this a problem you say?

I'll use this example:

The song "Paid" from the Kid Rock album The History of Rock lists Bob Marley has the contributing artist. That's just one example of too many to list and fix. I could care less about Contributing Artist. Plus when I go to Kid Rock the song is not there. So in other words when scrolling the Artist selection I get a listing for Bob Marley.

Now please don't hold it against me that I have Kid Rock on my iPod. I have a wide range of musical taste.

I am just out of luck here? I am going to just have to bite the bullet and manually change all of the offending tags? If that's the case can someone recommend a good and ideally free tag editor?

Thanks all,
David