Get rid of Shademand - it installs SID 3 which isn't a great softmod.
First, don't unplug your Xbox - you can turn it off, but you need to keep the power connected to prevent an Error 16.
When you say "it doesn't start" what does it do? Do you get an error screen, and if so what is the error number? Does the LED change to yellow - if it does then you can repair your Xbox without hotswapping.
Whatever the answer is, to rebuild your softmod download Kingroach NDURE 3.1, use it and a clean 5960 MS Dash to build a good softmod file set. If your Xbox LED is yellow then you can boot with a rescue disc (Frosty's Rescue Disc is a good choice) and use FTP to restore the softmod. If you are getting an error message then to get the new softmod onto your Xbox you can hotswap and use xboxhdm, or hotswap and use Xplorer360 beta 6 to copy the files across - in Xplorer360 C is partition 3, and E is partition 4. Make sure you manually copy ernie.xtf before xbox.xtf, as it says in the Kingroach manual, paragraphs 4 and 5.
This post has been edited by Heimdall: Jun 9 2010, 08:34 PM