I don't remember if this is a new feature which became supported somewhere along the line of PVD releases, but I've just noticed that PVD appears to allow to browsing to/specification of networked locations for stored video files. A quick test suggests it works both locally and from a remote laptop. Addresses seem to subscribe to the format '\\(PC name)\(Shared Drive Letter)\(Path)\Filename.wmv'.
Assuming this is as it appears to be, and now means that copies of PVD on my laptop etc will successfully find & play films stored on a shared drive on my desktop by clicking PVD's play button, is there any simple way to replace all previous references to the local PC drive with a shared/networked one?