Make sure the service you sign up with uses your MAC address of your H5 2TC and that way, it shouldn't matter what IP address you use.
I have seen people take the devices they use to stream IPTV on holiday as the service they are signed up to uses the MAC address for authentication.
Can you clarify, is it your internet connection is 5 meg or the speed you get once the VPN has kicked it?
Most VPN's do throttle your overall connection speed so if you have 5 meg to start with then you may struggle....