I've got a project here that was shot on HDV, on a JVC GY-HD100U
which we'll be bringing into Final Cut 6.0, via a firewire cable
connected to a Sony HVR-M25 deck.
can someone help me with this step by step its not working
There is a very simple reason its not working: the Sony deck (1080i HDV 2 standard) does NOT output 720P HDV 1 standard video via firewire. The reverse is also true of my JVC deck and Sony 1080i footage.
I believe that your deck can play the 720P footage and output it via component video. So you either have to use the camera as a playback device or capture the component video from the Sony deck via AJA/Black Magic card.
BTW, if you shot 24P on the JVC, NO other deck (besides the JVC BR-HD50) will work AT ALL - and that includes the other JVC HDV deck and the other JVC HDV cameras!