I/O & software interfacing

Hello,
I'm another babe in the woods and could use some guidance.
1. Has anyone used LabJack or SparkFun products in custom FS applications. I feel like they would work but am unsure if FS will recognize inputs from these USB devices and how to make them be seen in FS like commercial yokes. pedals, throttle etc?
2.My ambition is to build a multi screen sim for use with GA airplanes & helios.
3.Correct panel layout for functioning switiches and controls are primary desires, this may be accomplished by multiple portable cockpit panels and controls.
4. My mechanical skills are above average and I have some limited Progaming some skills in BASIC language.