Get a SHOP manual, follow directions.

Its a fairly involved job and requires a couple special tools.
If you want to save cash remove the forks and bring them to a reputable shop and have them do the seal re and re. Mechanics like those jobs cause you've done all the grunt work.
Most of the labor is in re and re the tubes.
I was just leaving the trade when USD forks were getting popular on streetbikes and my experience is limited and my memory is also. I do know they can have some tricky assembly and refilling procedures.
Definitely get a shop manual.
edited to say:
If you tackle the job remove all plastic and the gas tank and put in a safe place. Make sure you have the bike well tied down and supported. Call the shop ahead and see if they have the parts first and if you tip some beer to the shop will they do it while you wait.

I always changed my own on my dirt bikes. The forks should be similar. Do what stemcell said and buy a manual. Then, buy or borrow the appropriate size fork seal driver. Before inverted forks, you could use a pipe, but you will hate life if you try to change them without one on inverted forks. Buy some Simmons fork seal grease and use it when you reassemble them. Follow the instructions in the manual step-by-step and you shouldn't have a problem. Make sure you bleed the forks correctly and get the correct oil hieght in them when you reassemble them. Also, make sure everything is EXTREMELY clean when you reassemble them, or they won't last long at all. Just a few tips.....

PS: go to the racetech website and you will find some helpful information.

If you've never done it, it can be tricky. Either get the shop manual, as advised previously, and follow the directions explicitly, or take the demounted forks to a shop and have them rebuilt there. I used the latter method to have the fork seals replaced on my Ducati, but I watched the guy do it in case I ever had to do it myself. It's a little tricky, but can be done. You will probably need special tools to dismantle the forks and put them back together. If you have a good relationship with a shop, they may let you do the work at their place, using their tools.

the gsxr 1100 fork needs a spring compresser. the springs are short and very stiff. ive seen people do a lot of damage to there forks by
not knowing how to do it properly. put a ding in a slider and it will cost you $350.00. its a whole lot cheaper to pay a mech. to do it. and if it starts leaking again next week, he'll warrenty it .   dave