Those little screws when you flip open the flaps are all you need. Get an 8mm hex wrench, undo them and out pops your stock hu.
98' BMW 328i - Jet Black, Black Leather, Alpine CDA-9831 HU
<span style='color:red'>For Sale:</span> Sony CDX-F5000 Xplod w/ Wiring Harness, iBook G3 900 Mhz 640 MB SDRAM w/ Original Box and Software + OS X Panther + Microsoft Office
(PM on any offers, Going on E-Bay soon ...)