To play as Tailsonic, launch WindowsZone, (I recommend when the updater comes up, select all of the boxes) And then when Sonic appears, right-click him, and select Load Player.
After that, it should open File Explorer. Select the file "tailsonic.ini". these types are the only types of player files the game can read.

Anyway, if you have any questions, don't ask me, ask the original creator. - Connor Mugaas Offcial

=)

(you don't have to read this if you've played v1.0 already)