I read some of the other posts and was still not quite sure what to do with all my files. I searched around and finally figured it out. I'm going to post up actual instructions for getting your mp3's burned to discs and then burned with titles to your Z1!
Step 1: Go to http://www.poikosoft.com/ and download Easy CD-DA Extractor. It is a $29.99 program that comes with a 30 day free trial. I'm only 2 days into my trial... i'm not sure if you could uninstall the program then reinstall it for another 30 day free trial... we'll see.
Step 2: Install the program.
Step 3: Use the drop down directory to locate the folder with all of your mp3s.
Step 4: Drag the desired files into the Burn window. Make sure you are in the "Audio Cd Creator" tab.
Step 5: Once you have made a list of Files to burn to the disc you must make sure there is absolute continuity between songs of different artists. The Z1 is case sensative to even the slightest bit. Use the "CD Text" Tab at the bottom of the page to rename all of the files correctly using the exact artist name. If the artist is featuring somebody, I would reccommend deleting everything but the original artist name... if you dont, it will create a separate artist folder under the Z1.
Step 6: Once you have created your list and double checked for continuity you may burn the disc. Go back to the "Create CD" tab. Make sure that the "Write CD Text" Check box is Checked.
Step 7: Burn the cd. Take the cd to your Z1 and let it rip!
If you have problems still with several songs of the same artist showing up under different folders on the Z1 you will have to do some additional steps. I used music match jukebox, but you can use any ID3 tag editor... there are many free online. I found that Deleting the album information under the ID3 tag helped. I had several songs from the same artist off different albums. They showed up in different folders on the Z1. Once I deleted the album information everything was ready to go! Feel free to contact me with questions, i'll help out as best I can.