Update this column in WF using SP designer

Apr 23, 2012 at 4:53 PM

I have a requirement to modify this field's URL based on a condition.

I can succesfully do this via a custom workflow built in SP Designer.  Unfortunately, when I update the field, it updates both the strings for the URL and the Image URL.

How do I go about pinpointing just the URL value?

Would I have to develop the WF via Visual Studio?  And even if I do, would I have to import this column type solution into my project in order to get context to it?  Does anyone have a recommended approach?