I assumed you knew you had to knock the old races out. If i remember correctly, i used a long punch or chisel- through the top of the steering head- to knock the lower race out.The races came out easily enough. I then used the old races in combination with a bushing driver set to install the new races. I don't recall it being very difficult, but then i do this sort of thing nearly every day.
Just like installing new wheel bearings, i overtightened the adjuster nut while turning the forks side to side in order to make sure the races were fully seated, then readjusted to what i felt was proper preload.
Sorry you're having a tough time with it.
In retrospect, i should have taken pics of the process, but i was just in a rush to get it done on Friday night so i could ride Saturday.
