Initiating services when logging on

[andy <geek_show@dsl.pipex.com>]

Greetings one & all

With Slackware, using XFce4, I used to know how to do this, but with 
Etch, using Gnome, I am coming up short: how do I get the xscreensaver 
(and other services) to initiate when I logon? Each time I logon, and go 
to use the xscreensaver I am given a message that says the server isn't 
running and asks whether I want to start it. Well, yes. But, I would 
like to figure out how to start it automatically.
I've looked through different dot files but can't see anything obvious.

Any suggestions?

Thanks

A