I have a ms28 TS-H943 with 1.2 ixtreme flashed on it already.
I have my original firmware files and all so I'm wondering what the next steps in flashing 1.4 is
The only problem is the disc I used to first flash is completely new so the old backup file folder are not there anymore

you can just flash over the old firmware
make sure after the dump that your firmware has a good key.
make sure to save it.
have a look at the video on flashing
http://robinhoodsplayground.com/forum/view...f=110&t=401