The GCN version of CSK does not require a MSI installer and is available in CSVS format only.
You should be able to download it from
http://www.gotdotnet.com/Community/Workspaces/workspace.aspx?id=39959859-68b5-4f5e-bd85-c1a8555e39a9
There is a dedicated forum in the SourceDiscussions section of the ASP.NET forums (GotCommunityNet) and additional documentation on the installation procedure as part of the download.
HTH
Colin Munford
http://www.colin-munford.me.uk