How to Sync locally stored Audiobook files to your Zune. MP3 or WMA onlyTested on Windows XP 32bit, Vista 32bit, Vista 64bit, Windows 7 32bit, Windows 7 64bit, Windows Server 2008 32bit, Windows Server 2008 64bit
Software needed1. Download and install the Overdrive software from
www.overdrive.com2. Download the Zune Overdrive .Wax Creator from
http://tinyurl.com/ZODWC I have limited bandwidth. PM me of you are unable to download the file.
How to Sync1. Put all of the audiobook files in one folder. Sort the files by name.
(rename each file in order i.e. Book1.mp3, Book2.mp3)
2. Go to bing.com or google.com and find a JPG that you would like as a book cover.
Save it to the same folder as the audiobook files.
3. Run the Zune Overdrive .Wax Creator (ZODWC31.exe)
4. Click Set Audiobook Folder. You will be prompted to select the folder that the audiobook files are stored in.
5. Click Set Audiobook Tag. You will be prompted to input the Author's name and Book Title.
6. Click Start Audiobook Transfer.
Zune Overdrive .Wax Creator 3.1 Interface

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How to remove the books from your Zune
Sadly, Overdrive either left out or forgot to create an easy way to remove the audiobooks their official response is
We are sorry for the trouble. Unfortunately, currently there is no way to view the contents of the Zune other than using the Zune software. To delete the titles from your Zune you must use the OverDrive Media Console and follow the steps below:
1. Select any WMA title from your list and click 'Transfer'
2. Once the transfer wizard pops-up select "Advanced Options"
3. After this windows comes up select 'Browse' This should take you to the contents of your Zune.
4. You will be able to either delete the entire folder or select each part one by one. After you have done one of the previously mentioned options 'Right Click' and select 'Delete'
We are sorry for the inconvenience of this long process. We are hopeful that we will be able to fix this problem in the near future. Please let us know if we can provide further assistance or information. Thank you.I would recommend using the Zune Hard drive hack and change your registry to allow you to see your Zune as a drive and just delete the audiobook files manually.