NSF
Take LHR as an example. The 27R/09L ILS ILS have a common frequency and paired DME. The DME is biased to read 0.0 at the landing threshold - the actual DME is at the midpoint of the runway. The 0.0 reading is achieved by biasing the DME by a few micro seconds or whatever. FMS 2 does not display the DME in the usual position on the PFD, you have to tune the frequency manually in the radnav page.
In general, FMS2 doesn't do much for the pilot, still no fix page as per Boeing etc, lots of extra keystrokes and they've moved the '/' key which gets you often!