if you never did well at soldering try an avoid it, but if you fell like doing it by all means go for it.
soldering iron has to be a variable heat controlled duratec or any other good brands but can get expensive and a very small tip, the smallest you can get with the iron station.
solder that i use is .08 in thickness
flux paste i use to help with flowing the solder, and leave a much neater job.
cleaning the surface before you start soldering is a must.
i'd do some test shorts first before attempting to solder on to the mobo, just incase you do a booboo, remember practise makes perfect
its all in the hand, and dont press to hard, or else you might dig to china