Thank you very much for your kind reply kevin. So surely Firstspot v3 won't have any problems letting VPN tunnels go through it :) so, I understand the 'VPN tunnel over VPN tunnel' issue would depend ...
I am testing the Firstspot v3 and one of my questions is if end users (hostspots' visitors) would be able to use VPN software in their own pc's, as for a case they plan to connect to their enterprises ...