Updating ListView Web Part Views in SharePoint 2007

Recently I got a question about a similar task that I had earlier last year and it involved a case where there were many (and I mean many) SharePoint 2007 sites and subsites containing webparts that had views showing certain SharePoint list information. However customer later realised that they needed the webpart views to contain the same view as the default view of the SharePoint list. So they asked if this can be done somehow automatically as a lot of time would be wasted updating each and every web part view manually (considering the amount of sites).