Embed combo box in cell

Thanks to several on this site, my project is almost complete. If I could ask for anything more it would be for the 5 combo boxes to be enbedded in the cells they are covering ( or at least navigate like cells, on enter or arrow keys. See attached workbook. If it means that the boxes can't function as they do now, I'm not sure it's worth it though.
Thank you,
Sick