Hi Javier,
For the look of your reskins, may be you should tweak the light of your TS19.
Regarding the Iberia or Varig aircraft liveries, they do not exist for Trainz, but this can be easily repaired, with some time..
The only airlines , I guess, which could have in mind an "around the world" trip are Air France and better British Airways. They were prevented by the so many problems arising with supersonic flights, and the costs..
Pascal