user xsession or how to start ssh-add

[Balazs Javor <jb3@freemail.hu>]

Hi,

How do I start ssh-add when X starts to add my key to the agent?
(Agent is already running?)

I've tried to figure out what exactly happens when I do a startx,
and followed several of the config files in /etc/X11/. I think
I generally understood the concept of the xsession.d dir, which
is pretty neat, but very hard to read...
In Xsession.options I have the allow-user-xsession, so I was hoping
that when I create a .xsession with the line

ssh-add &

it would be merged somehow to the rest.
Well X didn't even start...

What is the correct way to do this?

Many thanks for your help in advance!
best regards,
Balazs