Remote Installer -
Even logged in as a Domain Admin, Microsoft has to protect us from ourselves. Are you running the remote installer with the right-click "Run as Administrator" option to make sure that you're utilizing the cosmic god-like authority of that Domain Admin account when it's running?
Local Installer -
Sure thing. Check this KB out: http://knowledgebase.solarwinds.com/kb/questions/5200/Additional+LEM+downloads+for+version+5.7