For "variants and schemes", it's possible (if a bit technical) to repaint models, if that's what you mean: http://www.fsone.com/tech_6393.php
If you mean adjusting things like powerplant, prop, CG, throws, dual rates: all that's in the sim too. Start with http://www.fsone.com/tech-faq.php
, "Tech FAQ - FS One V2", section "Scaling Wizard (for airplanes)."
Manning, eh? You might be the northernmost FS One owner besides Santa Claus himself. I'm surprised you're flying anything except indoor helis!