To concatenate in place, you can use a macro like the one found he
In article ,
I'm highlighting two cells in the same row, hitting format cells, alignment,
merge cells and I'm getting the error message, "The selection contains
multiple data values. Merging into one cell will keep the upper-left most
data only." I want to be able to make the two seperate cells one without
deleting anything and without having to cut and paste.