Google searched the topic because I heard it was possible, after searching here on AZ I didn't find anything referring to this, nor did I find it on the ross-tech website. This is a link I found from Google posted at AudiForums, quoted text below is what was said.

To change the number of times the blinker flashes when you tap the turn signal stalk, go to Address 09, Central Electronics. Select function 10, Adaptation. In the Adaption window, go to Channel 02. Note the stored value (original is 3). Set the new value to the number of flashes you want, and then test the output. If the test gives you the desired output, key SAVE, then DONE.
Can anyone confirm or deny this? If so, what vehicles did it work on?

I am going to try it tonight when I get home from work and post if it works or not...