[imp] where is setup the IMP's name ???

[gerald STEPHAN]

  Hello everybody

  I want to change my IMP's name ?
  By default it's called "Courrier (IMP 4x.x.X)"

  Where can I change this name to have in my homepage
  welcome to IMP or welcome to my application IMP
  instead of, by default, Welcome to Courrier ?

Thanks