User-agent: msnbot
Disallow: /

User-agent: asterias
Disallow: /

User-agent: ScoutJet
Disallow: /

User-agent: asterias
Disallow: /mp3
Disallow: /samples
Disallow: /likemusicvol1
Disallow: /likemusicvol2

RewriteCond %{HTTP_USER_AGENT} asterias [NC,OR]