I installed LR3 and have been using for approximately a year. I did a horrible job importing my photos, it's a mess. Basically what I want to do is wipe out all the images and catalogs and "start over" importing images. My previous edits are of little concern. If anyone can help with this I would greatly appreciate it. Thanks.
Start a new catalog (File > New Catalog) and import all of your images. Delete your old catalog.