[PD] Loading externs

[RG]

Hello again list. I swear this is my last problem... for now. ;)

ok so I've been using PD for about a year now, and shame on me I still don't know how to load externs. so. here are some images:

This is what I get when I open PD:
      http://img519.imageshack.us/img519/1348/pdonstartup6le.jpg

This is my Search Path window:
      http://img519.imageshack.us/img519/9895/pdsearchpath3vu.jpg

and this is my "Bianaries to load on startup" window:
      http://img519.imageshack.us/img519/8793/pdstartuppathinfo8zi.jpg

what am I doing wrong?!!

Thanks for all your help,
RG