Look in the guides to preping the d0 etc (tutorials section) and the LPC points if they have solder in them already.
also, a quote from you
" i have a couple of chips but none of them are installed. When i power up it tries three times and then it just stops. Any ideas? "
Please clarify if you xbox works when no modchip is installed. If it is booting fine without then you have a bad connection with the matrix to one of the LPC points.
Insert the screw into the modchip(don't tighten yet)
From the side, visually line up the d0 (you should get the light in mode 4 I think?
SLowly with your other had tighten the screw till there is a bit of tension(just a bit, not to much or you'll scratch a trace).
No move the matrix till you have all 3 leds lit. Then tighten the screw down some more till there is no movement. Hope this helps.
This is the only way I could successfully get mine to install and I've had it in over a year now with no problems. (not one FRAG, reboot etc). It's been rock solid.