Graphic and textlayers in MSWord 2003

I created in MSWord 2002 a table with several lines and rows. Then I put a handfull of cliparts and own graphicfiles into the cells. Next I inserted some text into the cells. At least I sent the graphicfiles behind the text into the next layer. Now I have the problem that I cannot modify the graphics anymore. has anybody an idea to bring the graphicfiles back to the front, so that I can modify the graphicfiles again?
Many thanks for any ideas
Otmar Strau?