lowey, MODZ has been around for awhile. I would try downloading the version from IDDEA http://www.iddea.org/downloads.htm IDDEA is good at keeping their downloads up to date.
Also you can try CivTools from Bentley. http://communities.bentley.com/commu...m/default.aspx
There is also ModElev from the CDOT workspace that I know works with V8i http://www.coloradodot.info/business...-configuration
Then there are two manual ways to set the elements to an absolute elevation.
Set your Active Z to 0, set your X and Y scale to 1, and your Z scale to 0.000001. Now do a fence scale of your elements.