H,
I'd say the best way to get them on is to get the car on one of those drive on lifts, one guy on top reaching through the engine bay the other guy loads them from under the car. If you can't do that then at least get the car up as high as you can with jack stands and load them from under the car. It's not that hard but you do have to pay attention. The rocker panels will have to come off to mount the side tubes unless you bend the tabs flat and mount them under the frame...not recommended if you already had them ceramic coated as the coating will chip off the tabs.
If you have AC I believe the pump and bracket have to be pulled out of the way, can't remember if the ALT has to as well. You should be able to leave the starter in. Luckily I put mine in the same time as the new motor so I just dropped them in before the motor and tied them out of the way with wire.
When you want to get rid of the restrictive Hooker mufflers let me know, I'm a distributor of STS baffles for the 4" hookers. If you need more help just click the link to my site or email me. You're going to love the sidepipes!