Try these helpful links:
Try the new adobe touch app adobe collage:
Photo Collage Toolkit
UPDATED June 12, added Picture Package Support via PasteImageRoll and BatchPicturePackage scripts.
The package includes four simple rules to follow when making Photo Collage Template PSD files so they will be compatible with my Photoshop scripts.
There are eleven scripts in this package they provide the following functions:
Europe, Middle East and Africa