I asked this at Daz, got one sarcastic response from the resident forum t&%ll.

The essence is there is a cool plugin that Muphasa was kind enough to make  http://carraracafe.com/?p=2451

In the download page there promises to be a few hints on it in the download - change parameters etc. 

Tthe original Daz forum thread was nuked in the forum 'improvements' in the past.

The sand plugin works very well but I was hoping to change the density and possibly change the shape

of the 'sand' particles etc. 

There is a text file (in presets?) with the number 128 (?) in it and I tried a few varitions but had no effect.

The other files (dat??) I cant read with notepad. 

cheers and thanks in advance :)