Kevin wrote:
I'm getting myself confused as to what I need in order to run a shower
with body jets.

A 3 way diverter is described as having 2 outlets.
A 5 way diverter is described as having 3 outlets.

e.g. http://www.devatap.com/deeva_prod_list.asp

Can anyone explain this to me, and what I actually need in order to run
shower and body jets independently or at the same time ?

i.e. Both switched off.
Shower head only.
Body Jets only.
Both at same time.

The simplest solution is to fit 2 stopcocks (as on the deva website). T
the outlet from your shower valve and run to the head and the jets
through the stopcocks. Then you just turn the head stopcock on to use
the showerhead, and the jet stopcock on to use the jets. You could also
use the valves in a tap kit like this for the same purpose
http://cgi.ebay.co.uk/2-Handle-Cross-Basin-Mixer-Tap-wall-mounted-8258C-617_W0QQitemZ6052831301QQcategoryZ42347QQrdZ1QQcmd ZViewItem

A