Hi and thanks for the reply,
Tried to use the WebPI installer but was repeatedly getting download failures for some elements
so i followed the links and downloaded manually and installed most features.
as regards server log errors here is the one related to install.php in the IIS logs
#Date: 2009-05-14 13:24:06
#Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status time-taken
2009-05-14 13:24:06 ::1 GET /SilverStripe-v2.3.1/install.php - 80 - ::1 Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+6.0;+SLCC1;+.NET+CLR+2.0.50727;+.NET+CLR+1.1.4322;+.NET+CLR+3.5.30729;+.NET+CLR+3.0.30618) 500 0 0 296
Thanks