Press the MODE button and turn the dial to Av. Aperture should stay the same so that the depth of field does not change in between exposures. Only the shutter speed should change.
Press the FUNC button once or twice and set White Balance to AWB (Auto White Balance). Our system automatically corrects white balance so you don't need to do it in the camera.
Press the AF DRIVE button on top and select High-Speed Continuous Shooting. This way, you'll be able to take all bracketed exposures with a single press of the cable release or shutter button.
In the C.Fn 1:Exposure menu, under Number of Bracketed Shots, select 5 shots. Then hold down the MODE and AF DRIVE buttons simultaneously. Turn the dials so you have 5 exposures at -4, -2, 0, +2 and +4.