If you previously requested, have, and successfully installed Essentials using the previous hotfix you do not need to request it again.
However, if you meet the following criteria the SCE installation can fail as discussed the article.
• You are installing a distributed installation of Essentials where the SCE Management server role and SQL Database role are on separate servers
• The computer on which you try to install Essentials 2007 has a domain suffix that does not match the fully qualified domain name (FQDN) of the domain. For example, the computer has a domain suffix of department.contoso.com. However, the domain is named contoso.com.
• The computer on which you try to install Essentials 2007 has a NetBIOS domain name that does not match the first part of the FQDN of the domain. For example, the NetBIOS domain name is CONTOSO-XYZ. However, the domain is named contoso.com instead of contoso-xyz.com.
The updated hotfix can be requested via the following link : http://go.microsoft.com/?linkid=6294451 using the KB article reference KB931831