LDC can't custom msvc package,must install visual studio .net ?

[FrankLike via digitalmars-d-ldc]

At LDC 0.15.1,my win7 x86-x64 is not install visual studio .net 
2012,but I can copy some vs2012 folders(common7, VC) into LDC and 
  copy 3 dll files to bin folder(msvcp120d.dll msvcr120d.dll 
vccorlib120d.dll),set link at bat file, then ldc2 works ok.
But in 0.17.alpha1,LDC2 must detect whether install vs2012,you 
know that vs2012 is very huge,but some folers is small ,only 
474MB,I think copy it and to use is very cool,are't you? Now,I 
can't work with LDC0.17 alpha1.
Can you let us do some set,not to detect folder,ok?

Thank you.