How do i unlock (?) my phone to new software

[Guest b16mts]

Hi,

I'm trying to install Sniper blutooth software, not for nasty purposes, just fed up with not being able to blutooth files to people from my m5000, but it won't install cos my phone will not allow me to install the software.

I remember from my oild c500 days i unlocked the phone so i could install any software, can this be done with the m5000? if so, how?

PLEASE HELP ME!

cheers,

Martin