First, this is my first tutorial I made, so it's probably not perfect. If you are interested in a new bios, but doubt you soldering skills or just don't have access to solder, mirror defogger, conductive ink pens, etc. then this guide is for you.
Assuming that you have already determained what bios and tsop flasher you will use, and you know how to use the them, this is a tutorial on how to flash a v1.2 - v1.5 xbox without soldering. You will only need some house hold materials for this tutorial! This worked for me all four times I did it without any problems.
I am not responsible if you break your xbox doing this. I did this successfully four times with no problems. You are responsible if anything goes wrong.
What you'll need:
Xbox
Scissors
Clear tape (QUALITY TAPE)
Time and patience
Aluminum foil
BIOS and flasher (Earasia disc recommended)
You may wan't to clean the points with a damp q-tip and alcohol before doing this to ensure good connection.
1. Open you xbox and remove the hard drive and DVD drive. You can remove the IDE and
DVD drive cables from the motherboard for more work room if you want.
2. Find the points that you will need to bridge, and using the scissors, cut a small piece
of foil that will fit on the points to be connected. Make sure it isn't too big so it doesn't touch anything but the points you need to connect. For more reliability, make sure you make the foil to have more than one layer.

3. Cut a small square of tape a little bigger than the foil and put the piece of tiny square foil you cut out earlier in the middle of the sticky side of the
tape.
4. Put the tape on the points, making sure that the foil is touching the points AND
THOSE POINTS ONLY. If the foil is touching anything else, it could do damage to you xbox.
5. When you're ready to flash, you will need to leave your xbox open. Plug all the
cables that you took out back in and set your DVD drive aside. During the flashing
process, you will need to hold the foil down with you fingers, applying a reasonable
amount of pressure. Remember to hold the points before the flashing process starts.
**If you don't apply enough pressure, you may get a read only error. Press hard enough, but not hard enough to break your motherboard.**
Note: Again, I highly recommend using the Earasia disc (was the only flasher I used) to flash because it gives you the time you need to get your fingers ready and apply the pressure. It keeps you informed of what's happening and you don't need a retail 007 AUF disc.
Also know that you will need a 256k bios for xbox versions v1.2 to v1.5. Any other bios won't work. And never flash a bfm bios to your TSOP.
Warning: Don't let go of the points until you are sure that the process is completely finished. If you
let go during the programming or earasing process, you might get a bad flash.
Hope this helps someone