create agenda that automatically adjust time in word 2007

Question

hi, how will i create a table based agenda in word 2007 that will automatically updates the time assigned to each speaker when ever i change time allocations

i want to create some thing like this which is an excel sheet but want to do this in word

http://office.microsoft.com/en-us/templates/TC300013331033.aspx?CategoryID=CT101172311033

thanks NICK