Change the model related to a drawing

Here's the problem, I have abunch of detail drawings that arebased on the part file. Well the decision has been made to base thedrawing on the assembly file showing all of the pressed-in hardwareinstead of the piece part. Does anyone know how to convert theseexisting drawings over?

I have tried the technique of File>Open>References, but itwill not allow me to change from a part file to the assembly file.I have tried to change the references of the drawing file using SWexplorer, it did change it, but when I open the file it still showsthe views being related to the part file.

This is in 08 sp 5.SolidworksDrawings And Detailing