Hi frtommy,
At the church where I attend, the pastor uses the following remote controller in conjunction with VideoPsalm:
http://www.amazon.com/Kensington-K72426AM-Wireless-Presenter-Joystick/dp/B009K1PYG0</span></div><div><span style="font-family: "Trebuchet MS"; font-size: small;">It can emulate the standard PowerPoint keyboard keys, control the mouse pointer, and has a green laser pointer instead of more classical red colored ones.
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Other controllers will do, notably Logitech or other brands.
We had a Targus remote, but its buttons were sometimes not so precise, this is why we switched to the Kensington one.
The following model also has good reviews on amazon, but I haven't tested it myself:
http://www.amazon.com/dp/B00SYK18T0</span></div>