On a compute node, this will actually be installed in the system directory, so it's in the path; a normal LoadLibary() call will find it and any programs linked with the msmpi.lib import libary in the CCS SDK will work just fine....
Member '<classname>.<procedurename>' that matches this signature cannot be overridden because the class '<classname>' contains multiple members with this same name and signature: <signaturelist> Member '<interfacename>.<procedurename>' that matches this signature cannot be implemented because ...