The grey spaces are just the background of the map.  Your starting point is the room labelled "insertion point" and you won't be able to have the shuttle fire into the station without depressurizing it.  (assuming you break past the bulkhead)  Here's a visual aid on what the outer map looks like.<br/><br/>"Damaged Corridor" means a corridor full of broken cables, wrecked machinery, and possibly impassible damage.  There's lots of cover, but it's fairly hazardous to get through.<br/><br/>Here's a picture of the exterior of the station to give you a better idea of how you're getting in.  (the red dot is your shuttles)<br/><br/>(http://i440.photobucket.com/albums/qq125/1460311/Station.png?t=1304571430]http://i440.photobucket.com/albums/qq125/1460311/Station.png?t=1304571430)