how can i add heading in Matrix Report for columns and rows

How can i add a column heading for coulumns and row heading for rows in Matrix report created by wizard. i m using vs 2005 ..You need to create a Row Group or Column Group but at least from my perspective I have always stayed from Matrix's in MS RS and the reason why is - I cannot control the extrapolation of the matrix to the defined width of my report - probably a lousy reason - but I "fake" out based on a regular table layout a matrix look and feel with drill through's...
If the user wants to see everything then "click" and everything will be displayed - but for the first panel of data I provide as much possible releavant info and you want to see more then click on a link and I will navigate you to eternity! Also, when I navigate I keep the primary data field they clicked on as a parm and display this in the subsequent (called module) so the have a "path" of wheer they started there "infinite journey" from!
Best regards,