Here is the link to a great file renaming utility that I use:
http://www.bulkrenameutility.co.uk/Main_Intro.php

It is free and powerful. It has a learning curve, but it’s worth it. It works great with Vista, too.
The main "boxes" I use are the replace box, which works just like a traditional search and replace, and the prefix box, which simply adds letters to the beginning of your filenames. You can also change the file extensions using the extension box:

The trick is to make sure you highlight the files you want to change the name for. A preview of the filename will automatically show up next to the original filename so you can check your results before you click the rename button.

Enjoy!

I had been trying for some time to create a mapped network drive to a remote WebDAV folder using Vista, but I was unable to figure this process out until recently. Apparently, Microsoft has a Software Update for Web Folders (KB907306) that enables the Web Folders component in Vista. Once the update is installed, you should be able to map your drive.

1. Open the Computer icon on the desktop or Start menu
2. Select "Map Network Drive" in the top toolbar
3. Select "Connect to a Web site that you can use to store your documents and pictures" 
   
   
    
4. Select "Choose a custom location"
   
   
   
5. Enter the URL of the folder you want to connect to (i.e. https://www.myserver.com/myfolder/)
6. Follow the steps outlined in the Wizard, they should be pretty self-explanatory.