Print on the Context Menu

When I right click, say a jpg, and choose print. It opens "Print Pictures". I have all my image formats associated with Irfranview. How can I get it to print through the default program instead of opening up "Print Pictures"

Why you ask?

I am writing a program in VB.NET and doing a shell print command with the jpg. I just need it to print to the default print, no questions, no options, just print, which happens on xp machines. But in Vista, it ALWAYS opens up the "Print Pictures", even with the default program set as Irfranview.

Any Ideas?

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