Where is the fountain of knowledge for learning about CNC setups / understanding them

[Palletlad]

Ok I do believe I've messed up the settings on the vfd control box... #sigh
is there a way to reset the settings on the box or do I just go through each setting again and try and put it back to default?
Also I believe I have found someone who has the same box as me and took photos of the innards so I copied the images for you guys to check out and see what I am dealing with, this person also had a UC100 so there thread did not help me.
I am attempting to set up Mach 3 to be able to control the spindle/VFD but am I right in thinking that I cannot do this via a parallel port and instead require a UC100 and Controller card?
I am very tempted to ask if there is anyone that lives near me for a 1 to 1 visit and assistance