How to combine data from two instruments into one  [SOLVED]

Hi, since OpenECry was changed to Gain Capital I have a mix of instruments for futures contracts. For example, there are two ESZ6 instruments one from OpenECry and one from Gain Capital. How can I combine them together?

Also when using Custom Futures of ES how can I make sure the recent data that was collected as Gain Capital goes back to old data that was collected as OpenECry?

Thanks!

I think you can export data to ASCII format then import data to new data source of same instruments.

You can also merge data sources into a single chart, if that would work for you.

Otherwise you'll have to manually export data from each symbol and import it into the other (or create a new destination symbol in which both other symbols merge), as Wzero already mentioned.

Do the symbol roots match?
You can try changing data feed for OEC instruments in Quote Manager.

Thanks all for the answers. Changing Data Source from the Edit Symbol dialog in QuoteManager did the trick.