RE: Camtasia or Fraps
If you're gonna shoot footage from games, Fraps is the way to go.
Camtasia is brilliant for desktop filming, for example showing somebody how to make tables and charts in Word and shooting a video of it. I tried Camtasia with FS2004 once, but it simply wasn't designed for that kind of thing.
FS9 & FSX running on Q9550 Quad @ 3 gHz, Nvidia 512 MB 9800GTX+, M-Audio Firewire 410, 2gb RAM, CH Yoke & Pedals, Top Gun Afterburner II, TrackIR Pro
X-Plane 9 running on Apple iMac 27"