I know how to insert a new manual reading.
I would like to automatically insert a new interpolated value at a specified date and time into the meter totals. How do I do this?

You can enter a wierd value like 9999999999999 at a specific time, manually.
It would then fail to audit, and should give you a link to the right that says 'recalculate'. Click the recalculate link and it would work it out according to profile from another total, and fill in the interpolated value.
Is that what you're looking for?

Thanks a lot!