This might help
Xbox Bios confusion
>> With all the releases today it looks like alot of people are a bit confused.
Todays releases :
*COMPLEX.Bios.Debug.4627.And.MS.Debug.Dashboard.XBOX-COMPLEX
The 4627 DEBUG Bios & Dashboard have been converted to run on a retail xbox. Has all 3 hacks : no-patch , no-reset & HDD-swap.
This release is NOT made for normal users , it's only for developpers.
You can NOT boot original games with this BIOS & DASHBOARD.
*COMPLEX.Bios.Retail.4132.And.4627.XBOX-COMPLEX
New BIOS version for 'normal' users. Has all 3 hacks : no-patch , no-reset & HDD-swap. These Complex BIOS versions are also able to run debug signed executables.
There are 2 files in this release , one based on the 4132 BIOS and one of the 4627 BIOS. Several people reported 4627 does not boot originals either , so use 4132.
*MS.DASHBOARD.RETAIL.4627.XBOX-COMPLEX
The new MS dashboard that will come with the new Xbox version. (4627)
Nothing really changed here except a new saved-games management. Complex also removed the DVD Region from this dashboard.
*EvoX 2.3
An unofficial EvoX release (not released by Team EvoX). It's based on EvoX2.2
It has all 3 hacks in 1 (like the X-ecuter BIOS) : no-patch , no-reset & HDD-swap.