Switching Dynamic Channels after HSDIO settings have been committed

Hello.  I'm trying to find a way to switch between two dynamic channels in a waveform after the HSDIO waveform is initated. 

Would someone point me to an example or reference where I could learn how this is done?

For example: 

I have a PXI-6561 in a 1062Q chasssis.  I am assigning channels 0-3 as dynamic and using HSDIO write to populate the 4 channels from a waveform.  

I need channels 0 and 1 to be un-disrupted and repeating (all channels are the same lenght).  Channel 2 is data sent to an IC and channel 3 is used for queing updated data.   I'd like to HSDIO write to channel 3 and then, when the write process has completed, I would like to swap channels 3 and 2 before the waveform begins another cycle.  

I have tried this by re-calling the Assign Dynamic Channels node.  This did not work because Assign Dynamic Channels does not work after the waveform has been initiated.  

A very similar question was addressed on this forum at the below link.  This did not work for me because the waveform is already commited when I want to make the switch. 

http://forums.ni.com/t5/Digital-I-O/HSDIO-Dynamic-Generation-of-Digital-Signals-on-Separate-Non/td-p/2279466

Also, I'm open to suggestions about a better way to accomplish this.

Thank You,

Sean