Instead of Bookmarklets there is an easy way to map mouse clicks to hotkeys. This AutoHotKey script is an example:
MButton::
Send +{NumPadDiv}
Return
In the example, every time you press the middle mouse button, it would send the Shift-{NumPadDiv} hotkey to open the Selector window. If you download AutoHotKey look in the help under Hotkey and it has the various ones for the Mouse. Just change "MButton" for the mouse click or wheel action you want. Once you have it the way you want you can compile it to exe. You can even have it launch Selector using the Run command, so that you only need to have one icon in the Windows start folder.
You might find it fun. There's an AutoHotKey forum too where people will help with fixing your scripts.
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