Move the device you want to be the startup page to the top of the listing in NeoSynch. This will set it as startup. Tim Builer, the author, has had to field several emails from NeoSynch users confused about how this worked.

Tim has also created a new version that works with the RC3200 (doesn't erase codes on the extra hard buttons). He was going to submit it for inclusion in the Files section here. Either it's taken him longer to get the package together than he originally thought, or Daniel is still behind/having space issues with putting new files up.