I just bikepedia'd your Raleigh Detour 4.5. Everything will fit your trucker, EXCEPT:
Headset.... Detour has a 1.125" threaded; LHT is threadless.
Stem... For the same reason as the headset (threaded versus threadless)
Seatpost? Actually, bikepedia didn't give me the diameter of the post, but it may not be 27.2mm that the LHT takes, plus that's a pretty wretched seatpost (no offense).

Rear hub is a rm30, spaced at 135, which is good for the LHT. Everything else is pretty straightforward.

hth
-rob