If your laptop doesn't have a right mouse key, you can always use 
shift+F10.

I found the following two pages on the Logitech MX5000. The first one 
says 404 error, but if you keep arrowing down from the Not Found 
heading, you find a cached version of the page. I'm pasting only the 
most relevant information. You may want to read both in their entirety 
as they contain lots of really useful detail that may render the 
keyboard usable.

http://www.geek.com/xyzcomputing/logitech-cordless-desktop-mx5000-laser-571305/

The hot keys on the right side of the keyboard link users to their 
default email client, messenger, Status, and even a webcam. Below this 
is the calculator button and F Lock. This keyboard has a number of 
functions associated with the F keys by default. The F9-F12 keys are 
fully programmable. To access the F functions you have to make sure the 
F Lock is on, which to any power user will seem to be backwards and 
counterintuitive to the point of being ridiculous. Basically, Logitech 
has hijacked your F keys and replaced them with hotlinks and a few super 
basic “CTRL+” functions. To get your F keys back you have to turn the F 
Lock on at the start of each session.

http://logitech-en-amr.custhelp.com/app/answers/detail/a_id/9716/~/customizing-my-mx-5000-keyboard-with-logitech-software-%28setpoint%29

Programming function keys

The Function Keys, or F-Keys, are the keys labelled F1 through F12 above 
the number keys.

Similar to the Programmable Keys (discussed above), the F-Keys can also 
be programmed to perform certain functions. You can do this by 
simultaneously pressing the FN key (located between the right CTRL and 
ALT key next to the spacebar) and an F-Key.

1. Open SetPoint and click the My Keyboard tab on the top of the screen 
and select the Keyboard F Key Settings tab on the left (shown below).

2. Select the key you wish to customize under the Select F Key field.

3. Now select the task you want the keyboard key to perform under Select 
Task. You can also click Help to find detailed descriptions of these 
options for your device.

In the example above we selected open web page. Next we need to specify 
which page we want the Help key to open. Enter the web page in the 
location field.

4. Click Apply to save your settings. Click OK to exit SetPoint.


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