Using ELMAH for error logging within Sitecore

Since a while I use ELMAH for error logging in my custom ASP.NET applications. Normally in a Sitecore project I log all exceptions to the Sitecore log files. But the disadvantage of this is that the exceptions are in the same files as all Sitecore log messages. So I tried to implement ELMAH within my Sitecore installation. What is ELMAH? According to the official site: “ELMAH (Error Logging Modules and Handlers) is an application-wide error [...]