What rocket described is one way of doing it.
Another way is to map a joystick button to the stick set key. There is kind of a trick to this if you want a single button to alternate stick sets.
Go to setup/stickmapping/global keys, scroll down to "stick set 1".
On my MS sidewinder I use button 2 for the stick set button.
Across the top you'll see the 4 stick sets.
..............Set 1  set 2  set 3 set 4
stick set 1   none   but 2  none  none
stick set 2   but 2  none   none  none  
stick set 3   none   none   none  none 
stick set 4   none   none   none  none
Set it up like above use whichever button is easiest for you to use. You'll use it a LOT.
Also I set up guns to fire full guns on set 1, and primary only on set 2.
Then go to view keys, map all the "UP" views to your hat, make sure you have "set 2" selected.
Apply, go on runway & test it. If you have trouble give me a yell at billj69@qwest.net
I'll email you screen shots of my setups and 
if neccessary will meet you & help talk you through it.
[ 09-08-2001: Message edited by: Ghosth ]