However when looking at the grid, the columns display the actual id ... I want to display the BLEND.ccode instead, the first column of the comb box ... is this possible?

The quickest way to do this is to set the column's sparse property to .F. However, if you want a more elegant solution, download the "How to put a combo box in a grid" session from my wensite. The white paper and code samples should show you a better way to do what you want.