It's a fair question. 
The file definitely exists where I believe it should...
Directory of \\servername\d$\Websites\Forums\bin
08/08/2006 10:54 AM <DIR> ..
08/08/2006 10:54 AM <DIR> .
06/15/2005 09:52 PM 28,672 CommunityServer.GuestBooks.dll
01/03/2006 10:39 AM 20,480 Telligent.CommunityServer.Registration.dll
01/26/2006 10:14 AM 20,480 CommunityServer.Spam.Rules.dll
02/03/2006 07:31 AM 581 License.xml
02/03/2006 07:31 AM 581 License - Community Server.xml
02/21/2006 09:22 AM 192,512 CommunityServer.Blogs.dll
02/21/2006 09:22 AM 540,672 CommunityServer.Components.dll
02/21/2006 09:22 AM 32,768 CommunityServer.Components.SearchBarrel.dll
02/21/2006 09:22 AM 376,832 CommunityServer.Controls.dll
02/21/2006 09:22 AM 286,720 CommunityServer.Discussions.dll
02/21/2006 09:22 AM 139,264 CommunityServer.Files.dll
02/21/2006 09:22 AM 286,720 CommunityServer.Galleries.dll
02/21/2006 09:22 AM 28,672 CommunityServer.IPBanning.dll
02/21/2006 09:22 AM 36,864 CommunityServer.Mail.Common.dll
02/21/2006 09:22 AM 20,480 CommunityServer.Mail.Data.SqlDataProvider.dll
02/21/2006 09:22 AM 24,576 CommunityServer.MemberRole.dll
02/21/2006 09:22 AM 24,576 CommunityServer.Points.dll
02/21/2006 09:22 AM 73,728 CommunityServer.Reader.dll
02/21/2006 09:22 AM 36,864 CommunityServer.Spam.dll
02/21/2006 09:22 AM 184,320 CommunityServer.SqlDataProvider.dll
02/21/2006 09:22 AM 634,880 CommunityServer.Web.dll
02/21/2006 09:22 AM 1,286,144 ComponentArt.Web.UI.dll
02/21/2006 09:22 AM 94,208 CookComputing.XmlRpc.dll
02/21/2006 09:22 AM 733,184 freetextbox.dll
02/21/2006 09:22 AM 155,648 MemberRole.dll
02/21/2006 09:22 AM 20,480 MetaBuilders.WebControls.MasterPages.dll
02/21/2006 09:22 AM 69,632 RSS.NET.dll
02/21/2006 09:22 AM 139,264 SgmlReaderDll.dll
02/21/2006 09:22 AM 28,672 Telligent.FreeTextBoxWraper.dll
02/21/2006 09:22 AM 32,768 Telligent.Registration.dll
05/05/2006 03:58 PM 45,056 anrControls.SyntaxColoring.dll
05/05/2006 04:00 PM 28,672 Telligent.FreeTextBoxWithCodeEditor.dll
08/02/2006 03:20 PM 36,864 CSCommunityCredit.dll
33 File(s) 5,661,834 bytes
2 Dir(s) 80,723,705,856 bytes free
The only thing that is non standard is the physical name of the folder that hosts the entire website, but I don't see why that should be a problem for this app only. It's all fine from an IIS perspective, and I haven't previously had any issues adding modules or running the site on a whole.