Richard Hopton (https://twitter.com/#!/RichardHopton ) created a great alternative Prefetch Path API for Linq to LLBLGen Pro. It's open source (MIT licensed) and it's available here: https://github.com/richardhopton/LLBLGen.Linq.Prefetch

It's a great little API which can make specifying prefetch paths simpler for a lot of cases. It's a drop-in extension so no extra code needed. The API works side by side with the existing APIs for specifying prefetch paths in Linq to LLBLGen Pro.