HTMLCreativeAsset backupImageAsset = new HTMLCreativeAsset();
backupImageAsset.setAssetFilename(imgAssetFileName);
flashInpage.setBackupImageAsset(backupImageAsset);
// Set the target window for backup image.
TargetWindow backupImageTargetWindow = new TargetWindow();
backupImageTargetWindow.setOption("_blank");
flashInpage.setBackupImageTargetWindow(backupImageTargetWindow);
// Save the Flash in-page creative.
CreativeSaveResult creativeSaveResult = service.saveCreative(flashInpage, campaignId);