If you wish to move a node, or selection of nodes, to another location (including Lanes within other Episodes/Scenes), you can select content, and use the 'Cut' functionality, located in the context menu for node structures.
To do this, just select, or multi-select a group of nodes. Use the secondary click on one of the nodes in the structure, and select the 'Cut' option; this will remove the selection from its current location.
From there, you can 'Paste' anywhere on the Storymap; in the example below, please note how, with multiple lanes open, the user can transfer content from Lane 1 right into to Lane 2.
When you paste the nodes, any content associated with those nodes will be preserved and carry over, such as script content, as well as any of the IDs generated on those nodes.