Customizing Applications Jumplists

Is there a way to modify a jumplist for a program that doesn't use it, or is that built into the app itself?

I'm mainly interested in virtualbox, I'd like to pin the virtual machines to the jumplist so I don't have to futz with the gui. Like wise for opera.

Do I gotta sit on my hands or is there tweaks for that?

I created a shortcut to my VBox XP-vm using the VBox command line and pinned the shortcut. It works for me.

Why no specs?

I did that too for one workstation, but I'm switching between setting up three or four different virtual machines, it'd be nice to keep them together.

Maybe I'll just use this Jumplist Launcher - Create Custom Jump Lists

I just opened a second vm. Now, I see what you mean.