You can use any flash method you want once the points are soldered. Both of those programs should work along with any others that are not modchip specific I know about. "raincoat, flash bios in evox, etc" Only when you have a sharp or windbond tsop do you have to be selective about what programs you use to flash the tsop, and neither tsop was available on the 1.0 xbox.
If you check Lord Vader's sig you will see a good diagram of how to split the tsop into multiple banks allowing you to run 2 to 4 different bios configurations by switch. The mod only works on version 1.0-1.1 xboxes which you happen to have. This makes it easy if you have to switch back and forth between a vga, linux, debug, or retail bios. It also gives you an escape from a bad flash if you flash all banks individually.