How to play Bluray rips without mounting an iso

Hi, been ripping Bluray to HDD for a while and have been using Power DVD8 to play them from a mounted iso.
I believe the alternative is to use a certain version of Power DVD7 which will play them in "File mode".

Well, I also use a program called DVBViewer (£12) for satellite HD broadcasts & tuner card but the latest version (V4) will play HD video rips in file mode.
Just drag the file over to the DVB Viewer shortcut on your desktop and it will be played.
(Note my DVBViewwr is set-up to use the directshow filters from Power DVD but there are others that are free)