This is what some of these "pre-modded" xbox sites are doing. Some poor fool orders his new system, expecting a mod-chip, and when it arrives, he opens it up, and see's no mod-chip. It is deceitful if you are selling the xbox's claiming they have a mod-chip. (Just a side rant, directed at the un-named fiends among us!)
Anyway, if you are just flashing TSOP on your own box, and don't care about live, or any other future changes, good luck with your TSOP flashing! But don't for one minute think it is the "best" solution. It may be cheaper, and easier to keep working because your soldering sucks, but the inability to restore the machine to factory config and use live is not worth it to most of us...