Ok for those out there who run into the same problem as me, just use caspol.exe. There is no mscorcfg.msc in the SDK like some people would like to think. It is simply
not there. Maybe the people who claim to have mscorcfg.msc have older versions of visual studio or Windows SDK installed or an earlier version of dotnet.
is Windows Vista Home Premium 64 with VS 2008 professional only. And, even downloading and installing the Windows SDK 2008 didn't give me caspol.msc either so don't bother.
to add a trusted share, it is easy like this:
CasPol.exe -m -ag 1.2 -url file://vistapc/vs2008/* FullTrust
Euclid Friendly Computer Service