Any tips on installation?
Once you've got your new PSU open your case and have a good look at where your power connectors go. There's usually two cables directly connected to your MOBO, one for each HDD and DVD drive, Fans/fan controllers as well and obviously the GPU.
Once you're confident you know where they all are, touch something metal to discharge any static, or wear an antistatic wristband if you have one.
If some of your cables are routed behind the motherboard tray you will have to open the other side of your case as well. Check to see where cable ties have been used and undo them and start to remove the power cables one by one, try to be carefull not to loosen the SATA cables while your in there to avoid that heartattack moment when your PC doesn't boot!
Removing the PSU is pretty straightforward, its usually just the four screws on the rear of the PSU.
Installing the new one is pretty much the reverse of what you've just done.
If you have a modular PSU use all of the preinstalled cables first before plugging in any extra ones, take your time routing your cables tidily to maximise your airflow through the case, and double check everything is fully connected before powering on.