Add a user-customized toolbar button to IE 7

I am running WinXP SP3 w/IE 7 (with IE 7 Pro). I am looking for a way to add a customized button to the IE 7 toolbar. What I want to do is deploy a button that will print the current window using a specific printer, IOW without me having to select the printer to be used if it is not the default printer. To be more specific, I want to print the window using an installed PDF virtual printer when I so desire without having to actually select that printer from the Print…. button.

I have an idea how to do this, but I would like to know if there is a preferred or easy way to do this, and specifically what kind of script or command I would have to use for the button action (I can do this in VB 6, VS2008, or even Javascript if that would work, or whatever). All I want it to do is to operate like the normal Print… button on the toolbar, the one that drops down a selection for Print.., Print Preview.., or Page Setup, but I want it to just open the Print options dialog with the PDF Driver already selected as the printer to be used.

I have a procedure of sorts for doing this using the group policy functions but it is rather general. Is it possible to do what I want? Best of all would be if there is a free util for adding such a custom button to the toolbar.

Thanks

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Pete B