if your repair or is it science, forget which, is high enough, you can make repairs without getting the parts.
This is a good option, makes them better too (more xp I think? Sorry, vague memories of this...)
You can sneak in but you need good timing, let the woman talk to you, then back off and press against the wall further along the building, wait till you're hidden then slowly move towards the door, you should be able to reach it and enter whilst hidden, sometimes a guard will look at you but they turn away at some point.
Once you're in you're fine, everyone assumes you're meant to be in there.
The speech check is only 30 so any points in speech/a skill magazine may be able to do it (maybe slug a beer as well, that helps speaking).
Basically, you can sneak in, talk your way in, lockpick your way in, get in by being a goody two shoes in their eyes or if all else fails get the weapon of choice out and start knocking skulls.