Thank you for your post.
No, you cannot change the icon at this time. I would suggest entering this into our feature request database, accessible from our web site at:
Normally, I would copy and paste this information for you, but there are questions asked that only you can answer.
The information entered here is viewed by our Product Marketing and Development teams.
Just had to solve this myself and found a workaround. Assuming you've already created a Mac (.icns) file and a Windows (.ico) icon file.
On the Mac it's real easy, here's how you do it:
On Windows it was a real PITA to figure out, and only partially, but here's what I did:
Download this program: http://www.gdgsoft.com/gconvert/
Use the 'Modify icons in EXE/DLL...' command in the Tools menu
Open this program file C:\Program Files\FileMaker\FileMaker Pro 9 Advanced\FMI Runtime Resources\Internal Runtime Libraries\Runtime
The first icon shown is the for the Runtime program (app), replace this with your own icon
The second icon is for the database files, replacing this icon didn't seem to have any impact
Now rebuild your runtime and your Runtime should have the new custom icon
Hope this works for others trying to do this.
You are a genius. Thank you so much