i'm not too fimilar with the x-lite, but i remember hearing you flash it with a DHCP server with an ethernet cord instead of a usb cord with x-control setup.
as for the hdd bios flashing, its a little complex...
think of the x-chip's bioses as "special" bioses. The cromwell one and the X-chip_evox_v1.3 are base files of sorts.
sorta like an operating system. They're always 4mb to fill up the chip entirely.
you can't flash this type bios with the evolutionx dashboard either.
technicially you should be able to re-flash the bios "inside" the cromwell one you have installed now, but I have yet to get that to work personally...
basicly you gotta flash the 4mb bios file either by the DHCP server or usb setup.
once your set with the x-chip_evox_v1.3
you can fire up your xbox and you'll see a new flubber screen on start up with evox logos and x-chip logos.
additionally it'll say at the bottom, "press start to enter setup"
if you enter the setup, you can enable trainers, custom LEDs and other sweet stuff.
more importantly, you can setup more bioses WITHIN this bios. (if that makes sense)
although the file you flashed is 4mb the actually x-chip bios is really only 256kb i think.
the rest can be used to flash a whole bunch of other bioses of your choice. you can set it up where you can launch a certain bios by holding the A or B buttons while booting up and other things.
now this is somewhat of over kill really cause the x-chip_evox_v1.3 bios itself is able to boot the xbox in unsigned code all on its own. really its all you would need.
I however like to push the limits of it. I have the X-chip "os" running evox m8, a yoshi debug bios, cromwell, and a couple others i don't use. 4MB's of flash space is a LOT to work with cause most bioses are no more than 256KB to 512KB
well I hope this gives you some insight on what your up against and what the chip is capable of.
if you have any other questions, feel free to ask