Just an update, I've solved my problems. Successfully flashed FlashBIOS and Evox m8, and the system is booting correctly now

Basically, I hot swapped the Duox with the Smartxx. I had the d0 connected to ground, and had G connected to BT on the duox.
I have the smartxx installed with a male pinheader, and the duox had a male pinheader already installed. Since male doesn't fit male. I used a floppy drive cable. Since the cable's pinouts are not 1 for 1, that's what lead me to the xbox acting wierd when I tried to hot swap.
So I hacked up the floppy cable and soldered bare wires to the bottom of the motherboard to the pinheader pins. then when I went to hot swap, itworked.....to my surprise

Thank you very much everybody for the help and suggestions.