In order to effectively program the board with Synergy, you need a SEGGER debugger. Renesas has just produced a SEGGER J-Link Lite for Renesas Synergy debugger. It should be hitting the sales channels soon and it will be priced around $30.
We have a few pieces of this debugger and another debugger that is equivalent. If you want to write a tutorial on your embedded project, @jcasman can send a debugger in the US by postal mail. If you publish the tutorial, you can keep the debugger. If you’re outside of the US and want to write a tutorial, we can send you the link to the debugger to purchase when it becomes available and then reimburse you via paypal after the tutorial is published.
A short intro to building a custom image for the S5D9 is here: