[Milhouse]

How do you populate the NFO with streamdetails?

Use a media management tool such as Ember or TinyMedia.

I'll try disabling the Total Duration in future builds, but if it makes a noticeable difference (improvement) you'll need to badger the powers that be (ie. xbmc developers) for a permanent change as it will only be in my build and thus won't last forever... nor will it be a perfect solution in my build, as it will be permanently disabled rather than being an option.