preventing jittery scrolling when adding sprite batch node to layer

Question

Whenever I add the following lines of code to change a scrolling background (for each switch-case), it becomes jittery for about a second. Each background theme has it's own sprite sheet so I use two batch nodes to handle the switch-cases for their changes.

 [backgroundFrameCache addSpriteFramesWithFile:@"firstThemedBg-hd.plist"];
 backgroundBatchNode2 = [CCSpriteBatchNode batchNodeWithFile:@"firstThemedBg-hd.pvr.ccz"];
 [gameLayer addChild:backgroundBatchNode2];
 currentBackgroundBatchNode = backgroundBatchNode2;

How can I add the batch nodes to the layer in a way that would prevent the jitter?