How specify a location for Microsoft Visual C++ 2010 v10.0 in Simulink Toolchain

Previously I worked with Matlab R2011A (32bit) and MSVS C 2010 (32bit) as compiler, now I have to work with Matlab R2013B (32bit) and also MSVS C 2010 (32bit) as compiler.

So I have to test the compiling of S-function and the code generation of models with MSVS C 2010 (32bit).

----

My first problem (which I found a solution) is when I try to specify that my default compiler is the MSVS C 2010. I do the "mex -setup" command and then I say "yes" to: "Would you like mex to locate installed compilers [y]/n?" Then Matlab R2013B does not succeed to locate the MSVS C 2010. (With Matlab R2011A the MSVS C was located).

I find that Matlab R2013B try to locate this compiler with the path: "C:\Program Files\Microsoft Visual Studio 10.0" and mine is "C:\Program Files (x86)\Microsoft Visual Studio 10.0" Saying "no" to "Would you like mex to locate installed compilers [y]/n?" allows me to specify this path and solve the problem.

----

My second problem appears when I try to generate code from a simulink model and compile it. I see in the "Configuration Parameters -> Code Generation" that in can specify a "Toolchain" so I choose "Microsoft Visual C++ 2010 v10.0 | nmake (32-bit Windows)" but when I test this choice with the "Validate..." button a report is shown with "Toolchain is not installed."

For me, It was the same problem as my first question (like Matlab, Simulink default path doesn't include " (x86)" in the MSVS C 2010 root).

So my question is: "How can I specify to Simulink a different path for the MSVS C 2010?" And if the path is not the problem, "How can I worked with MSVS C 2010 in Simulink?"

Thank you for your answers.