Filter or Sort Different Webforms

I have 5 different webforms which all share a common select option data field (e.g. status: submitted, in progress, completed or rejected). I have successfully created a view which shows a summary of all the webform submissions, along with the STATUS field. However, I am unable to add a filter to the view based on the status field (i.e. I want to show ALL of the webform submissions which are in a Completed Status). I have both the data fields for each form defined in the view, as well as the corresponding relationship defined. I came across the Webform MySQL Views module which looks like it might work, but I saw one forum entry that it is not longer supported on the 4.x version of Webform. It also looks like a nightmare to implement. Suggestions?