Hehe. You could put it in the profile file and that would load at every login, not login to a console, just the first login. If you'd like you could start the file at a certain runlevel being booted. In that case you could put the script in the /etc/rc.d/rc.M or rc.runlevel (where runlevel is the number of the runlevel).
That would start the script when a runlevel would be run.