Is this the sort of script.vbs you want? http://vlaurie.com/computers2/Articles/scripts2.htm Simple backup script download the .zip (you can look at and edit .vbs same way as .bat) also once you have unzipped the .vbs make a copy and save it as a .txt file so you can study it.
*Simple backup script One thing that keeps people from using backup scripts is complexity. I wrote this script to be as simple as possible. It copies new and updated files from a selected folder and its subfolders. Click on the folder to be updated, click on the backup folder, and copy. If you don't have a backup folder, the program can create one*, it asks you every step of the way. (if you want to keep the old backups as is, then create a new folder when you have to choose where to put the backup)