rrdstarr- sorry I don't have an online picture host so I can't post a pic, but sent you a pic through e-mail. I installed the zerk right on the weld. It should be clear once you look at the pic.

X2K- Yes you would have to remove the control arm. I just drilled and tapped through the control arm (not the bushing). In my case the noise was coming from between the control arm and the bushing not the bushing and transverse pin?(I think that is what nissan calls the bolt in the center, the one for camber/caster adjustment.)
As far as noise out of the torsion bar I have never experienced this, there is no place to grease them as far as I know (it's splined). The noise you hear might be associated with the bushings.

ag_xterra- I've e-mailed slr about poly busings since I think that is what they use, but that's as far as I got, (never heard a reply). As far as I know energy suspension doesn't carry them but I could be wrong.