Execute Launch.exe .lch files

Hello World,

I customized my FirefoxPortable and it works well. But I've one trouble. I edited my App/Firefox/defaults/profile/mimeTypes.rdf to execute (and not display) my lch files.

Now when I click on it, I've a dialog box to select the application to open with. I select the Launch.exe and it works great.

But now, I would like to not have this dialog box. I would like to automatically call this Launch.exe which is in App/Firefox/ like my Firefox.exe

So, what can I do to do this?

Thanks in adv.