I never made this but i suppose anyone here would need it.

http://www.youtube.com/watch?v=vRzTgfo2PsM

I put to much strain on the Touchpad connector and now its broken,
I seriously recommend not to mess with your flex cable connectors to many times (like i did) because they are only rated for about 10 cycles (installing/uninstalling)

Luckily, instead of replacing the whole main board of my ds lite.
Im buying "FH19SC-4S-0.5SH(05)":
*0.2mm flex cable thick
*0.5mm pitch between leads
*bottom side contact
*4 pin contacts
from www.digikey.com
It isnt the same connector (see: molex "backflip"), but im convinced that
it will work better that the cheap connector nintendo made it with.

Im posting this because if this works; It will give other ppl more confidence to not worry about breaking stuff if we can find suitable replacements.

I will also follow up if this works n_n

Ya let us know. I broke mine once and had to get a new DS.

The exact replacement for the touchpad flex cable connector is 5014610401 from molex... google it
however finding someone who sells it, thats the real challenge

Anyways back to the Hirose connector "FH19SC-4S-0.5SH(05)"
I was able to make the touchpad work again with the hirose connector... however there where some problems...
while the lands of the 4 electrical pins matched perfectly,
the 2 side lands of the connector (used for strain protection, no electrical connection) did not match!
I was able to put some epoxy to glue the piece to the board to prevent any tugging/pulling from installation.
The flex cable fits perfect in the hirose connector.
After sealing the DS Lite and powering it on ...
the touchpad is alive again .

Anyway if anybody can find a vendor for the molex part please let me know
otherwise you can try the hirose connector at your own risk.