If DVRMSToolBox doesn't works well for you, try Digital media converter, which can convert dvr-ms to MPEG, WMV, AVI, MP4, iPod video, PSP video, MP3, WMA, etc. It works well for me. Learn more information at http://www.topvideopro.com/software/video_converters/dvr-ms_to_wmv_avi_mpeg.htm
Maybe help.
This is now a very very long thread! does anyone have working showanalyzer settings for UK freeview? have been looking round but nothing workable yet.