You can extract the files from the MSI without running any Custom Actions by using the following command line:
msiexec /a snf-2.0.6.50271.msi /qb TARGETDIR="C:\SNF_Myri-10G" INSTALLLEVEL=5
Or, for default settings, use the following command line:
msiexec /i snf-2.0.6.50271.msi INSTALLLEVEL=5
Afterwards, please use the Update Driver Network Adapter option.