The below includes documentation for a Windows 2012 Server, some variations may be seen depending on your server.
Initial Install Files and Updates to FOS Mobile are included in the FOS Installer. You will need to run the installer and install the Mobile Host and Web Service from the FOS installer.
An update to FOS Mobile will not install properly if FOS Mobile is already installed. You will need to uninstall the Mobile Host and Web Service from the add/remove programs before any update is installed.
Pervasive Database Server:
1. Install .NET 4.0 (minimum)
2. Make sure that all compatibility options are also installed.
Create the Database for FOS Mobile:
1. Go to the Pervasive Control Center
2. Right Click on Database and create a New Database
3. The Database name will need to match what is in the mobile configuration files – the files default to FOSDATA
*Make sure to uncheck the Create Dictionary Files (if they do not exist) and the Relational integrity enforced
Installing the Mobile Host:
1. The default folder for where the mobile host is located is C:\FOS\MobileHost
2. In folder FosMobileHost, open FosMobileHostService.exe.config in Notepad or another text editor.
3. Do Not Use Drive Mappings.
4. You will need to edit the configuration information as noted below:
EDIT
<add baseAddress=http://DatabaseServerName:8080/FosMobileHostService/FosMobileService/> replace DatabaseServerName with the machine name of the Pervasive Database Server. (Port 8080 is default, if desired a custom port can be used instead*)
EDIT
<appSettings>
<add key="FosConnectionString"
value="Server=DatabaseServerName;ServerDSN=FosDatabaseName"
replace DatabaseServerName with the machine name of the Pervasive Database Server.
replace FosDatabaseName with the DSN name of the FOS database, as defined in the Pervasive Control Center.
EDIT
<add key="LogFileName" value="C:\FOS\FosMobileHost\FosMobileHostService.log"
If necessary replace C:\FOS\FosMobileHost\ with a valid directory for the log file.
EDIT
<add key="FosDllPath" value="C:\FOS\"
If necessary replace C:\FOS\ with the directory where Fos.exe is located

*Ensure there is not another application using port 8080 and that it is opened in the firewall. This may be checked in the log file. If port 8080 is in use, you may specify a different port.
Installing the WebService:
IIS Web Server: (FOS Mobile Web Service is not required to be installed on the Pervasive database server.)
1. Install .net 2.0 (minimum)
2. IIS must be installed before .NET. If IIS is not installed, uninstall .NET, install IIS, and then re-install .NET.
3. Install the FosMobileWSSetup.msi.
4. The default file location on Windows 2012 servers is C:\Bin\WebApps\Site\FOSMobileWS 5. In folder FosMobileWS, open Web.config in Notepad or another text editor.
6. Do Not Use Drive Mappings.
7. You will need to edit the information in the config file as noted below
EDIT
<applicationSettings>
<value>http://DatabaseServerName:8080/FosMobileHostService/FosMobileService</value> replace DatabaseServerName with the machine name of the Pervasive Database Server. EDIT
<client>
<endpoint address=”http://DatabaseServerName:8080/FosMobileHostService/FosMobileService/” replace DatabaseServerName with the machine name of the Pervasive Database Server. 
Go to the services and Start the Mobile Host Service
Now you are ready to run the web test. This can be done internally by going into the IIS Manager selecting the Web Test right click and select browse. The user will need to navigate to the FOSMobileWS then select Content View to be able to browse to the web test.