Alternatively, we keep conditional comments approach and modify ie plugin to do smth like this:

```
if(typeof skrollr !== 'undefined){
    // non amd, let the plugin do its thing
} else {
    setInterval(function(){
        if(typeof require !== 'undefined' && require.amd){
              reuquire(['skrollr'], function(){
                   // let the plugin do its thing
              });
        }
    }, <smth-sensible-here>);
}
```