Lets's Encrypt with windows 2008 R2


I amusing Lone-Coder/letsencrypt-win-simple with windows 2012 r2 and IIS 8.5 and it works great. In windows 2008 r2 it receives the certificate but because of win 2008 is not supporting SNI the certificates can not be installed for domains. So what should i do to have all certificates installed for my domains? Thanks.