737 ops we do fly all non-precision approaches either in normal approach mode similar to an ILS (Integrated Approach Navigation) or LNAV/VNAV, only exception is a LOC approach with lateral navigation in VORLOC (IAN just tune the localizer and still fly in approach mode). However approaches have to be selected from the database and we are not allowed to change them or create them ourselves. If there is no database procedure available we have to revert to basic modes (VORLOC, HDG, V/S).
Raw Data check is not a problem as we can display NDB/VOR needles on the navigation display in map mode, ILS/LOC is displayed on the primary flight display.
As mentioned above we have to check Actual Navigation Performance against RNP. In newer airplanes we get visual cues about those on the PFD as well.