The AVIFile handler included with VirtualDub is capable of running in Proxy mode, that is, you can install it as the default handler for AVI files, and it will work with signposts that are renamed to the AVI extension. This means that applications which previously failed with the AVIFile handler because of the VDR extension can now be used, provided that the VDR files are renamed to the AVI extension. This support is very experimental, so try at your own risk. To try the AVIFile proxy support, first use auxsetup.exe to install AVIFile frameserver support, then use the REGEDIT tool to install the proxyon file. Use the proxyoff file to disable it. The proxy support will be invisible to most programs, but some programs do not like the proxy handler and will no longer work if it is installed; you will have to disable the proxy for these programs.