I've made many guides like this before, but searching through my posts, I've never made any tutorials on Firewire Security, so here we go. My first firewire tutorial!
Step 1: Go to: Start --> Right Click "Computer" & Select "Properties"
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Step 2: Now select "Advanced system settings"
http://i44.tinypic.com/34pkio4.png
Step 3: Select the "Advanced" tab and under Performance, click "Settings"
http://i43.tinypic.com/rs4hfm.png
Step 4: Now select the box that says "Adjust for best performance" & click "Apply" and "Ok".
Note: You may wish to re-edit these settings as your appearance will change a lot.
You will notice a big change in speed, it helps such a lot.
http://i43.tinypic.com/rs4hfm.png
Note: This does work on XP & Vista however, the layout may be slightly different.