When the above is of interest to you it is most likely that you already read the following article I wrote for Servoy Magazine http://www.servoymagazine.com/home/2004/11/article_how_to_.html. However, that is pretty complicated... Some succeeded and some failed using the tip.
Since Tiger the creation of startup items changed and should be more simple. I explicitely use the word should since it is yet another thing to learn . However, there is light in the darkness...
Because the logicboard of my server said goodbye to me 2 weeks ago I decided to use this mishap to rearrange my server and make sure all services (sorry for the word you OS X nerds ) work correct.
A few months ago I had run into an application that could help me to create startup items and BINGO. Creating a startup item with this tool for OS X Tiger is really easy... The name of the app is Lingon, it is a sourceforge project by Peter Borg and you can get it at http://lingon.sourceforge.net/. Go get it and try it. It is really great... I created a startup item for Servoy Server within 2 minutes
Hope you can benefit from this tip