yes it is possible with this version of LotroExtreme
(!empty($user->lang['CODE'])) ? $user->lang['CODE'] : ucwords(strtolower(str_replace('_', ' ', 'CODE'))):
if GetPlayerHealth() < 20 then Call Sound.PlaySoundFile (GetEnv("windir") + "\Media\notify.wav")
GetPlayerHealth() is function implemented in LotroServices that returns player health in % of maximum health like 100,98,99 ...