I read the manual and it seems fairly straightforeward. What are you having issues with?
ensure you are grounded before handling computer parts.
remove your motherboard from the case if it is installed.
remove the plastic from the base of the cooler
secure the proper brackets to the bottom of the cooler. straight ones for AMD, bent ones for Intel
apply paste to the cooler
fit the cooler onto the motherboard through the mounting holes, while holding the cooler in place flip the motherboard and secure the cooler using the spacer plate and the nuts.
install motherboard and cooler into case
reassemble the system, plug in the fans, and boot the system