Changing Properties of Print Merge Fields ?

I am using the print merge command in corel draw x4 and have hit a road block.
Is there a way to change the properties of the merge field to have a "fit" option?
I have a predefined text height and width i must use and i need it to fit into a certain size box. When i merge my excel document my text seems to exceed the limits of my square. I need to adjust the width of my text without changing its height.
I tried inserting the merge field into a text frame but that does not seem to work either.

Does that make any sense or did I confuse you ?

Your help is appreciated.