The Dom has been fairly extensively refurbished over it's lifetime. As previously alluded to, the interior was redesigned in the 90s. The arrangement now has the student on the right, seated at a console with a combined radar and air data computer display - actually quite a good nav system - with his instructor at a similar station on the left, about 2' further back. Behind them are LRU racks, and there are 2 seats for additional crew either side of the fuselage at the very back.
That said, the front end remains fairly clockwork, although the right hand seat now sports a radar display and keypad for the nav kit, and the aircraft is getting a SIFF update.
I'll dig out some photos in a minute...
Blunty