Execute Terminal.app command on either login or when terminal starts

Basically the title describes what I would like to do.

Basically the command is for an SVN on SourceForge (I'm helping out with a game - http://www.redeclipse.net/)

The command is

Code:

cd Desktop/RedEclipse

then

Code:

svn update 

Basically this allows me to download whatever the developer has added to the SVN file(s).