Doug, In the "Map Manager" select one or more layers, then right click and select the "Export..." command to produce a MicroStation compatible model or new design file with the desired thematic resymbolization applied to simple MicroStation elements…

Gaetan, Generally speaking, yes this should be doable. However much depends on the data you have in both your design file as well as in your spreadsheet. In Bentley Map you have the ability to define joins to external data sources, including what…