hi all
instead of seaching for the hard solution why not to go to the midle solution ? create a save game that would install the new dash and the new bios,
make a cd with all of the apps, emus , whatever you whant to install and with a script like slayers to install all the features you want. you would install the hack in one boot , in the second boot load the hack , the insert the cd and make the install of the apps. in the trird boot you will have a full modded xbox.