The heat issues are to do with the 5v leading to one of the points on the MCPX chip, increases the temp by a 1-2 degrees. If you stick a heatsink on it, it'll fix the heat problem..
Now, ideas_man69, you can do it that way or the other way is once you install the switch or switches, boot the Xbox on the first bank, than flip the switch to the second bank (while Xbox is on) and flash.
Reboot and then flash the 3rd and then 4th banks.
If your TSOP is already flashed with a hacked Bios, it'll be easy to do in Evox, otherwise you have to use a game save hack, etc to flash the first bank. <