SteveE said:

EDIT: Damn, didnt realise these were HD! Done a bit more digging and they are!!! So basically I just get a Blu-Ray drive now and burn it accordingly????????????????????????????????

Yep, you've got it now. I also grabbed a BD-R drive specifically for fanedit purposes. This one has worked very well for me, if you're looking for an external drive. Should be noted that for Harmy's, you'll need to use tsmuxer to get it in the right format, at least until they release the iso with menus, etc.