If you are just doing springs, all I did was jack the bike up, loosen the bars to get them out of the way, loosen the caps (carefull, it's spring loaded!), pull out the spring slowly to let the oil drip off, and put the new ones in. I used the stock spacers, didn't lower it, so you may need to adjust the oil level... I'm sure someone else will pipe up. But other than maybe swapping out the spacers, it's probably that simple.