The approach path could be made using glowpoints that flash in sequence, and have sprites shaped like an X for instance, with one such glowpoint on each navpoint in the hangar path. The current Arcadia model uses something similar, with the difference being glowpoints assembled in rectangles guiding the way instead of custom sprites that look like HUD generated images).
If there are different paths for exiting and entering a hangar, they could be marked with X's flashing in the appropriate direction that have different colors (ie. blue= exit, green= entrance).
If the hangar interiors use unique textures/UV-space, they can have a slight glow of the same color the diffuse map has to simulate reflected light, along with some bright white spots that work as lights inside the bay (IIRC the installation used in TVWP had its hangar door "illuminated" this way).
A set of glowpoints with the regular bright light sprites would do a good job marking the edges of the hangar entrance (ie. HTL GTD Orion).
