Jack up the car, remove the driver side wheel, remove plastic shields, remove driver side engine mount, ziptigh power steering and A/C lines out of the way, remove belts, remove water pump pulley, remove harmonic balance, remove top and lower plastic timing belt cover, put the engine in TDC (follow the timing belt installation instructions) remove crank bolt, remove the timing belt (see the timing belt instructions) remove crank sprocket. Take note to how the current oil seal is positioned. how far it is tapped in etc.
Use a seal puller, DON'T SCRATCH THE CRANK or oil case.
Clean up the area, lube the new seal with clean oil. You can use a oil seal installation kit or a pipe. make sure you tap in the seal using the middle to outer edges, farther out the better without damaging the oil front case. do not install the oil seal by hitting the center / inner most edge. Also tap it in evenly.
reinstall / replace your timing belt by the book. the rest is in reverse.
edit: this job, wont be easy with the motor in the car. But it does save you the cost of other fluid that would be lost if you removed the whole engine.
edit2: If you remove your transmission mount. Keep a 2x4 cut of wood between your jack and your oil pan. This will allow you to move your engine up and down while working on the hard to reach parts.