R13 - How to simulate numeric keypad to type ascii code?

Hello,

I have an alienware R13 without real numeric keypad.

I try to find the way to be able to insert ascii characters with keyboard (not by "insert" menu...).

At work, I have a dell notebook, without a true numeric keypad either, but with some dedicated keys with numbers in blue.These keys used with "Fn" gives numbers. As example, ALT + Fn + 0150 gives me the diameter symbol.

I try a solution to be able to do the same with my alienware?

Thanks for your help.