Sorting audio files into subfolders

Don't know if this is possible, but what I'm interested in doing is taking downloaded mp3 files and based on the tags, automatically sort them into a new subfolder structure so that I have something like:
ARTIST->ALBUM->TRACKS
Though I understand the concept of the 'Sort file into subfolder' rule, I can't seem to make it work for me. There are a couple of issues:
1. There doesn't seem to be a Spotlight attribute corresponding to artist name under the 'Other' lozenge - is there an equivalent to the MP3 'Artist' tag?
2. Whatever I choose from the 'Other' dialogue (for example 'Album'), the attribute doesn't 'stick' in the 'with pattern' box.
3. Sometimes, once Ive been through this process, some of the remaining lozenges can't be transferred to the 'with pattern' box - in fact, the 'Other' lozenge simply refuses to play ball!
Is what I'm trying to do possible - I'm fairly new to Hazel, but reckon I've grasped the concepts of rules, but I'm at a bit of a loss as to how the Spotlight attributes refer to more recognisable tags etc..
I'm assuming that something like this is doable as the web page refers to renaming your music files with artist, album and year.
Thanks...
ARTIST->ALBUM->TRACKS
Though I understand the concept of the 'Sort file into subfolder' rule, I can't seem to make it work for me. There are a couple of issues:
1. There doesn't seem to be a Spotlight attribute corresponding to artist name under the 'Other' lozenge - is there an equivalent to the MP3 'Artist' tag?
2. Whatever I choose from the 'Other' dialogue (for example 'Album'), the attribute doesn't 'stick' in the 'with pattern' box.
3. Sometimes, once Ive been through this process, some of the remaining lozenges can't be transferred to the 'with pattern' box - in fact, the 'Other' lozenge simply refuses to play ball!
Is what I'm trying to do possible - I'm fairly new to Hazel, but reckon I've grasped the concepts of rules, but I'm at a bit of a loss as to how the Spotlight attributes refer to more recognisable tags etc..
I'm assuming that something like this is doable as the web page refers to renaming your music files with artist, album and year.
Thanks...