Changing the PSU

I'm just about to change my 300W PSU for a 650W Antec Truepower.

Is it just a simple case of, unplug everything first, take out old PSU, put in new PSU, job done?

Never changed one before so just wanna make sure I'm not missing anything obvious.

Yes basically thats all you need to do. Just remember where everything was plugged into before you start unplugging fans and such (I have a very annoying thermaltake case that has like 8 fans and was confusing), it's a simple job if you have a simple case.

Yeah I'll probably take some photos beforehand cos knowing me I'll get distracted or something half way through!