Rails - Feb 2006 - Spreadsheet problems

Hey,

I want to regenerate a excel spreadsheet and send it to the browser.
The excel sheet does maybe have 5 tabwindows and a lot of formulas.

I use to make spreadsheet just for exporting records, but that was just making a
rhtml with ";" as delimiter and set 
@headers["Content-Type"] =
"application/vnd.ms-excel;charset=iso-8859-1"

I have tried spreadsheet-0.3.2 but i could sent it to the browser. 

Does somebody has any sample code or can help me with this?

Thanks in advance
Nick.