Thyferra is a real mission it is the second to last actually.(not counting bonus levels) You fly in the great and powerful X-Wing on Thyferra as well.
http://www.roguesquadron.net/forums/biggrin.gif) After Taloraan is Fest, then Chandrila, then Sullust, then Thyferra, and the last of the normal missions is Mon Calamari.
On Taloraan you should use the Naboo Starfighter, mostly because it is fast. To get more kills try shooting up more of the squints and eyeballs during the "standard Imperial swarm manuever."
And IMLADIL, I'll have you know I have had no trouble in shooting down the squints that shadow you on Thyferra, you just need to know how to use the X-Wing. Also, the Moff Seerdon's shuttle is much easier to blow with my X-Wing's proton torpedoes. You'll never do it with the dinky missles your A-Wing has!
------------------
"Tis easier to ask forgiveness than permission."