You're correct. You need to extract common.vpp_pc using "ThomasJepp.SaintsRow.ExtractPackfile.exe" (there's a GUI version too), then find the .xtbl file for the Activity you are looking for.Does someone know how to lenghten the available Mission Time mainly for the Sidequests. I think that this Information could be find in that common.vpp_pc File perharps? Does someone know where to find it exactly and Change it?