This will sound strange, but I am looking for a dev platform that I can allow the end user (of a runtime solution) to move or resize fields on the layout.

This would be kind of like a simplified report writer. I have written a DB project in FMPro 8 before and am familiar with it, but wonder if there has ever been anything that can create an on-the-fly customization tool. (am willing to upgrade if need be.)

Any thoughts would be most appreciated.

There is no Layout Mode in a runtime.

Thanks for the reply. Is there a report writer available - say like Crystal Reports?

You mean in the runtime? There's practically nothing in the runtime engine that isn't in Filemaker - see your FMPA Development Guide for a feature comparison.