How to know installed Reporting Services is which Edition?

Hi,

I have installed SQL server 2005 Reporting Services Standard edition On Server A and the Created the ReportServer & ReportServerTempDb on Server B which is a SQL Server 2005 Enterprise edition. Now I need to show my Boss with some query or somewhere in the server that what editions I have installed.

1. In Server B, I used the below query

SELECT SERVERPROPERTY('EDITION')---Its shows as SQL Server 2005 Enterprise edition.

2. But in server A, I have installed only Reporting Services. No Management studio. Now how can I show the Installed Reporting services is STANDARD Edition?

Where can I check for the edition?

thanks