u can use resource hacker for doing both of this...
for the icons & bitmap on the left side.. download the attached file (Defaut.sfx) then open it using ResourceHacker. replace the icon & a custom bitmap (93 x 302) with ur own... make a backup of ur default.sfx inside your Winrar directory.. then replace it with ur hacked Default.sfx... try making an sfx installer..
Click to view attachmenthope that helps..