How do I move context menu items into a cascading context menu?

Okay, I'm not sure if this can be done as easily as I'm hoping. What I'm wanting to do is move already existing context menu items into a cascading context menu to organize and reduce clutter. For instance, I would have a cascading menu named "Scan with" and inside it would be avast! Internet Security and Malwarebytes Anti-Malware.

On a side note, does anyone know how to remove the following context menu items?
Computer
- Show on Desktop
Control Panel
- Show on Desktop
Images
- Set as desktop background
- Print
- Rotate clockwise
- Rotate counterclockwise
Music/Videos
- Add to Windows Media Player List
.txt Documents
- Print
- Edit

Vishal has a method. Suggest back up the registry at least before doing any editing. A Ssyste Image is always preferred.

http://www.sevenforums.com/tutorials/4230-registry-backup-restore.html

http://www.sevenforums.com/tutorials/663-backup-complete-computer-create-image-backup.html

Add Cascading Menus for Your Favorite Programs in Windows 7 Desktop and My Computer Context Menus

A Guy