Want to try Squawkbox.

I would like to go on-line to either VATSIM or IVAO.AERO and use voice - with FlyII/patch 240 under WindowsXP. Having read some of the on-line info, here are some the questions that come to mind. Your thoughts and comments would be much appreciated.For working Canada/USA what would be the best network and ID to use ... VATSIM or IVAO? Can I use Squawkbox 3.24 on VATSIM? ... if not, which is the best Version to use? Which is the best voice software ... Teamspeak or Roger Wilco?... and can I use Roger Wilco with IVAO if that should be the best network? Which is the best server IP for connection in central Canada? I see that Squawkbox 3.24 lists a number of servers.Is is necessary to install all FLY acft if using either VATSIM or IVAO?I still find FlyII works really well, especially considering its age!Cheers, Brian.