[Count_Chockula]

Based on my limited knowledge with rooting and flashing a ROM the method sounds like it will work. But I'm a little nervous about it because it will take root away from you and then give it back to you via one file... everything I have ever seen about getting root tells me that you will need to do some stuff via adb in order to get root. But... it guess that it is possible that you can just put one file on your phone to make it do what it needs to in order to get root.
If you try this please let us know how it works out... I would love to know how it turns out.