Welcome to NICO.
What year/make/model parts car did you buy? I'm assuming a 240sx, but is it S13, S14, etc?...
If it happens to be a HICAS S13, I get first pick at what I want, right? lol.
Here is the link to download the S13 (91-94) FSM. I haven't looked, but that will probably tell you how to remove the doors/dash.
http://www.zeroyon.com/TheSite/techservice.html