I didn't explain the term "MLC" in my previous post. It stands for "Multileaf Collimator". All LINACs have a collimator to shape and focus the beam but the MLC allows the main beam to be broken down into hundreds of pencil sized beamlets. It actually dynamically shapes the beam during the entire treatment process. They can program it for optimal entry points to spare as much tissue as possible. In some instances people actually gained weight during treatment and had few side effects (I wasn't one of them).
I actually watched, with fascination, the MLC constanting changing its shape during treatment.

IMRT has a very good track record and is rapidly becoming a "standard of care" for radiation therapy.

The following link explains it pretty well:
http://ebroc.com/imrt1.htm

And also:
http://www.ucsf.edu/radonc/imrt.html

You would not need amofostine with IMRT. Many get too sick from it to complete the therapy.