VPN PPTP tunnel information

Greetings.

I am trying to create a PPTP VPN tunnel from the FG firewall with a group of devices that will have to be routed over the PPTP VPN, the rest of the computers will route as per normal. 

The devices must rout over the tunnel to a VPN server at another site.

please can someone assist me and let me know what the steps are? i dont want to use IPSEC etc. 

Regards