This sounds really cool. I have actually made something similar (unpublished and quite hacky though).
I work as a self-employed contractor and must report my times in varying standardised formats, depending on the client or agency I am working with. My input data comes from TimeWarrior (like yours) and I usually just output CSV data so I can copy-paste that into a provided excel template.
Quantizing the data is usually the most essential step as the templates often restrict accuracy. I find it strange that many of the comments here presume this kind of transformation to be fraudulent.
Lustmord