Below are the RS joystick button defaults, what functions are you trying to map to buttons 7 and 8?
 The following text was extracted from LucasArts Technical Support for RS: 
 Joystick Support 
 Joysticks are fun. 
http://www.roguesquadron.net/forums/smile.gif) We highly recommend using a joystick. Joystick buttons can be reassigned, but all joysticks (and gamepads) default to the following button assignments:   
 Button1: Fire Primary Weapon 
 Button2: Fire Secondary Weapon 
 Button3: Thrust 
 Button4: Brake 
 Button5: Special Action (S-foils, etc) 
 Button6: Link Weapons 
 Button7: Roll 
 Button8: Cycle Camera Views 
 Button9: Right Brake 
 Button10: Left Brake  
 Z-axis: Thrust/Brake 
 To disable joystick control of your craft while flying, press Ctrl-J. To re-enable joystick control, press Ctrl-J again. Joystick control will automatically be restored when the level ends, in any manner.  
 If you are having problems controlling your craft while flying with a Joystick. Check the fine-tune control knobs on your joystick. Make sure they are centered. If the problem persists, re-calibrate your joystick, either through the Launcher (Hardware Configuration button) or through the Windows Control Panel.  
 Also, when using a joystick, make sure you're not accidentally bumping or moving the mouse while playing Although the craft will auto-center itself if this is done, it can be very disorienting, and make the craft difficult to fly. One solution is to disable mouse support by pressing Ctrl-M while in-flight.     
 ------------------
 Ties are flies, swat'em!