No need to apologise, you're asking concise, sensible questions, that's what counts.
Sounding good so far - the Panel folder inside the Aircraft folder, that's where it belongs. The panel.cfg is there - good.
The pictures you are mentioning are indeed the panel and to get your instruments etc. we'll need to 'unrar' those .rar files.
If you don't have WinRar go to: http://www.izarc.org/download.html and download IZArc version 4.1.6. It can handle many compressed file formats including .rar files. IZArc is very user friendly.
Once you've installed IZArc, point at a .rar file, right-click and from the drop-down menu select -> IZArc -> Extract to .\xxxx(name of .rar file). You'll find this to be a good option as IZArc will create a new folder containing all and only the contents of the .rar file you just extracted.
This way you won't get confused when you extract more than one .rar file within the same folder.
Now we have to find out where the contents of the extracted files go. The first step is always to look for and read ALL documentation, be it a Word- or Text-document or PDF... in short anything that can be read.
Often the instructions (where a panel is concerned) can be found inside the Panel folder.
If still no ReadMe files or instructions of any sort could be found, it's quite possible that the author has included the pertinent documentation within the .rar or .zip files etc.
Because we are dealing with a Panel here, at least one of the .rar files will contain Gauges... in most cases you will be told to place those gauges into the Gauges Directory.
I strongly suggest that you copy and paste each item (gauge) one by one until you've become more experienced... the reason: often a gauge you want to put into your gauges directory already resides there and a prompt will ask you whether you wish to exchange the existing file with the new one.
The rule of thumb here is that you choose the file (gauge) which is of a more recent date as it could be a better, improved version when compared to the older one.
The above principle also applies to Effects which are usually placed into the effects directory.
A final note on gauges: Some gauges use the symbol/icon of a filing cabinet and instead of .gau use the file extension .cab - many inexperienced flightsimmers make the mistake of extracting the contents of those .cab files and end up in trouble. .cab files must remain intact in order to function.
Let us know how you are getting on. If all else fails, you can make a .zip file using IZArc out of the panel folder just the way it is and upload it to http://www.sendspace.com/ - include the download link in your next post and I'll have a look at it. I'd only need the Panel folder as I can place the panel into any twin engine airliner for testing.