I have just started using Google Experiments and have encountered a problem with adding the experiment code script. GA flags an error because the GA code appears BEFORE the experiment code. The experiment code is being added via the Premise Landing Page plugin. I have managed to overcome the problem by setting manual insert of GA code, and installing it via the Super Simple Google Analytics plugin, which enables the code to be inserted immediately before the </head> tag, and thus overcomes the problem.
Would it be possible to include a similar option in your plugin please?