is it possible to mod a ps3 te with a pcb off a 360 te?
Yes.
i gave up looking for a 2nd case… so i bought a cheap ps3 TE… so im gonna try to get it done… is there a walkthrough on how to do it?
Step 1:
Hack Xbox 360 PCB
http://shoryuken.com/f177/how-padhack-08-09-madcatz-4716-common-ground-xbox-360-pad-197388/
Some photos from this thread might be useful
http://shoryuken.com/f177/installing-mc-cthulhu-imp-xbox-360-sf4-se-stick-184787/
Step 2:
DualMod it.
http://shoryuken.com/f177/2-pcbs-one-stick-possible-146124/
Step 3:
If you want one USB Cord, use a DPDT or Imp Switch.
Unfortunately the PS3 dual mod is not a popular option. I don’t know if there is a walk through.
Edit: Now I know! and knowing is half the battle! GeeeeEEEYYEE JOEEEEEE.
http://shoryuken.com/blogs/chowwun/unessentials-ps3-te-stick-dual-mod-work-blog-pt-3-4-1015/
rtdzign, love the GI JOE saying. 
Can probably skip step one. Considering the TE’s PCB doesn’t really require hacking open a pad. Or trigger inversions. Heck, if you got crafty enough, you could probably keep the Turbo and RS/LS/DP functionality.
This tutorial is kinda sloppy, but it’ll get you started.
http://shoryuken.com/f177/ps3-te-stick-modded-360-sf4-madcatz-fightpad-56k-death-196633/
Doesn’t mention a DPDT switch but I’d recommend getting one.
i have a pcb of a TE 360 and i just bought a ps3 TE and im trying to combine them together…
Yes, you can do that.
Connect Directions to Directions.
Connect Buttons to Buttons.
Connect Ground to Ground.
Connect +5V to +5V.
Either have two USB cables going out.
Or use DPDT Switch or Imp to have only one USB going out.
i think im going with the switch… thnx jdm for the info…