If you're replacing the inner cable only, Riley88 has that covered.
However, I changed out the hole assembly including the outer cable. All I did was pull the cable with the parcel shelf carpet removed. I then reached under the dash on the passenger side for the cable and pulled in from the console. After that, I simply pulled it out after disconnecting it at the pedals.
To install, I removed the coin tray and fed the cable down the console from the front. I then fed a coat hangar from the engine side to catch the cable and pull it though the bulkhead. Once that it done, I fed the cable under the HVAC box towards the pedals.
The hardest pard is curving the outer cable between the pedal box and wiper motor. It took me an hour to get everything installed there....
After all that, I lubed the inner cable and fed it through from the pedal box side.