EclipseLink Tutorial?

Hi,

Is there a good tutorial for EclipseLink in RCP applications (maybe in cooperation with spring)?
I'm experimenting with Spring and Hibernate but I get massive class path problems and I found some recommendations to use EclipseLink instead.

But I can't find a good tutorial. I find it hard to adapt the ones from eclipsepedia, maybe I'm just stupid :)

Thanks for any information in advance.

Best Regards,
Marc