Trying to understand how FSUIPC/Widefs/panel building works...

Hey all,

New FSX'er here, just built my i7 4790k system within the last few weeks and I have done a lot of reading but still have a lot of questions.

I am running a 40" led on my GTX770 as my main display. 

I am wanting to use a 19" lcd monitor for a "glass cockpit" on CRJ and LJ45 aircraft (I am building a home cockpit).

1.I am trying to understand how exactly to use FSUIPC, do I need the free version or payware version? (I plan on wiring switch panels and stuff with a usb adaptor down the road).

2. How do I use FSUIPC, is it a program you use while in FSX or outside?

3. I am trying to figure out what software to use for building a glass cockpit panel. What is the best quality/easiest to use?

4. What exactly is Widefs used for, do I need it for this situation?

Thanks