Context Menu

I would like to add an "open with" command to the context menu for a specific program/programs. I am familiar with the reg edit "open with Notepad" command but I am looking to have an "open with" context menu for other programs I use on a regular basis. For example, opening a .txt file in Excel or a .jpg file in Fireworks.

I realize that in most cases I could get there by going to the "open with" section of the context menu but there are times that the choices may not automatically include the program I desire or frequently use.

Windows Vista