Table - find change column width

I have been searching for a way to universally change the column width of my tables in InDesign CS2. I do have a script that assigns a specified width to columns but my problem is not all the tables have the same number of columns and some of the cells have been merged and this causes havok with my script.

Each one of my columns has been assigned a paragraph style. If there is a way to find a specfic paragraph style (called “part number” or “list”), and have the script change the width of the column this would be ideal.

Does anyone have any idea if this is possible?