I have actually made the same with the mintcar sheets (forms by Slacker) and mailed them to Slacker for the upload. I can mail them to anyone else if needed

As I have written before, I am actually writing at a little program for fetching the data from a xls-sheet (the first will be Blakkies, others will perhaps be added later on) to populate either the official or mintcars charsheet (users choice).
It will be written in perl and have a GUI.
It will be cross-plattform-compatible with at least Windows, Linux, Mac, Unix (every plattform that runs perl to be exact).
It will be compilable - you won't need perl.
It will have a GUI to change the data fetched from the XLS - so you won't even need the xls but are able to enter the data directly if wanted.
I have some exams at the 12. and 14. this month - so I suppose a first version will be available 16. of october.
If someone wants to help (or test alpha-version later on): Drop me a message.
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edit: Clarification, language, spelling