Since I spent hours and hours trying to find information on various forums on how to accomplish this when I first started using Spring framework and subsequently, IceFaces and since I've been using both for a couple of years now, I figured I'll create a sample project and hopefully make someone else's life just a little bit easier.
At the link below you can download a sample project that integrates Spring and IceFaces in Java. It uses Maven so you'll need to get that installed.
Hope this helps someone. Let me know in the comments if it does or if there any problems. Due to my workload and a new baby I won't have time to troubleshoot with you but I'll try to help if it's something simple.