My friend
  told me how to set up a bash
 file (or whatever it's called) to start Jack and
 it starts on the command
 line. But I'm a command line dummy amd I can't type
 So I would like to know how
 to set up Jack through ths jack controle graphically. 
I think the first step would be to use qjackctl, which is the most common graphical
control interface for jackd, to get an idea whether jack starts up correctly and to set
the best parameters for your friend's setup, i.e. is he adressing the correct sound
device, are other processes running occupying the sound device. With a message output from
qjackctl we could probably of more help.
HTH
Frank