im not quite sure on the 5th gen springs,..but i dont think they will work,..as for the fuse box,..yes a 96 + fusebox will work becuase even though some models didnt some with power locks or windows,..they still had fuse slots for em which were left empty (same with other power options),...as for doors,..any 6th gen door (96-00) would work,..but keep in mind not all 6th civics came with power locks and windows,..so if you want to retain those parts,..6th gen EXs came with them like SIs did,..and HX models came with them also if im not mistaken