Internally iTunes holds star ratings as 0-100 and will actually show 1/2 ratings if an external program (like starTunes) sends values in chunks of 10. Internally starTunes calculates star ratings as decimal pointed numbers and then rounds then to the nearest 10 when it sends the results back to iTunes. A value of 50 will show as 2 1/2 stars.

Actually, I applaud you for doing something that kind of "sneaks in" the information in a more friendly manner. Unfortunately, such a crude scale, even on a 1-10 is useless to anything I would do. I actually created an Apple II (remember back to 64K mem, 140K disc?) disc based database of my Vinyl and used a 0-100 scale. When I transferred to macs and CDs, my database followed, but instead of a handful of fields, it has more than 400, most scripted to auto enter material, and handles full Kanji entry for asian music. Am I ever glad OSX brough Unicode to most apps.
However, I am not going to enter any ratings via iTunes until I have easy access to fields like "rating" and keeping fields, like "Catalog Number" "Record Label" "Full Release Date" "Copyright Date" "Series Title" "episode title" "True Compilation" -- not multi-artist, "Limited Edition" "First Pressing" "CD ID" "Lyrics" and a few other fields that are for true collectors and archivists, instead of just a bunch of lazy musci pirates.
I don't enter much material, other than basic titling into Itunes (which tags the lossless files I create). Mainly because, until iTunes has true multi-libraries, everytime I have to do something after importing, I have to delete the entire previous library in order to efficiently work with a new acquisition. So, though an excellent player and importer, iTunes still is primarily catering to students and music pirates.

Thanks for your impressive work though, a first step in what will hopefully be a great external update to a program.

If you do not like the colors for each of the star ratings you can change them in the preferences dialog.

that makes it a little better but everything just looks so old - almost like a java app.

Unfortunately the application framework that I am using for the tables is from 2000 (Metrowerks PowerPlant, not Cocoa) so it may look a bit dated.

ah, that would explain it:P

If your iTunes database is on an external drive you will have to open the database manually as I only look in your Music folder/iTunes folder. Select Open from the file menu and navigate to your external drive. You are looking for iTunes Music Library.xml. You may need to select "All Documents" to grey in the file. Once this file is open the application should work as normal.