sorry, my bad, i jumped to some conclusion here.
1. keep your orginal xboxdash as xboxdash.xbe and evox as evox.xbe.
2. and MSDashBoard = "c:\xboxdash.xbe" is correct
3. if everything is set right then your box would boot right. if not, there must be something wrong elswhere : check that you haven`t deleted any files in c:\ belonging to orginal xboxdash!
This problem reminded me so much of an earlier problem i had, sorry for causing any trouble