I followed below path
You need to install the JDI separately. Go to http://service.sap.com/patches -> Entry by Application Group -> SAP Net Weaver -> SAP NETWEAVER -> SAP NETWEAVER 04 -> NWDI -> JDI 6.40 -> #OS independent.
i can see SAPDEVINF14_0-20000267.sca, JDI ONLINE 6.40 SP14 if i download this is this fine Or is it necessary to download following files if so where will i found these three .SCA's
i would like to install on Sneak WAS which of SP14 version
is there any prerequisites apart from .SCA files