well, this is not much DRY, I think it will be nicer if you have constant map with it and use it on all places like:
```
URL_DESCRIPTION = {
  :cd => N_("&CD..."),
  :dvd => _("&DVD..."),
  ....
  
}
```

and then use here `URL_DESCRIPTION.keys`
and above
```
  *URL_DESCRIPTION.map { |k,v| Left(RadioButton(Id(k), _(v))) }
```