Hi,
If all your datasources/objects created in a transport request with your old package, create a new request then go to Request/Task Menu -- objects list -- include objects -- objects from multiple requests , choose the transports requests from which you want to add the objects and merge it. After that as i said earlier edit the transport request go to details and change to your new package.Now all your required objects will be collected in the newly created transport request from your old package to new package.
Hope this helps