Sonar, File Structure, and Plug-ins

Hello.  So thanks to the help of the folks on this forum, I was able to successfully download and install Cakewalk by BandLab (CWbBL) yesterday (everything worked without any problems - yeah!).  So now, my Win 7 studio computer has my old copy of CW Sonar X2 on it, and the most recent version of CWbBL. 
 
When a plug-in allows it, I install it into a dedicated plug-in folder on my C: drive (C:/Music/VSTplugins on my computer).  I do this to try and keep things organized and where I can easily find them.  I have a copy of Z3TA+2 that I bought from CW.  The Z3TA+2 installer does not allow the user to choose the install location, so my copy of Z3TA+2 is now located at C:/Program Files/Cakewalk/Z3TA+2.  Within that folder are three Z3TA+2 sub-folders (Resources, Arpeggios, and Documentation). However, the Z3TA+2.dll file is located at C:/Program Files/Cakewalk/VstPlugins/Z3TA+2 - this folder contains two files: Z3TA+2_64.dll and Z3TA+2_64 application) 
 
In addition, there is a folder named Z3TA+2 located at C:/Program Files/Common Files/VST3/  Within that folder is one file named Z3TA+2_64.vst3 
 
If I open the CWbBL Plug-in Manager, under VST Instruments it points to C:/Program Files/Cakewalk/VstPlugins/Z3TA+2/Z3TA+2_64.dll; under VST3 Instrument, it points to C:/Program Files/Common Files/VST3/Z3TA+2_64.vst3.
 
So this is confusing, right?  Where possible, I would like to remove unneeded and duplicate files and organize related files together in one place. 
 
Can I move the files Z3TA+2_64.dll and Z3TA+2_64.vst3 to my dedicated plug-in folder at C:/Music/VSTplugins?  Will CWbBL be able to find them there?  Can I move the Z3TA+2 folder that contains the resources and arpeggio files to my dedicated Cakewalk folder (where I try and keep other CW-related files) and still have Z3TA+2 locate necessary resources and arpeggios?
 
Special Bonus Question: what is the difference between VST2 and VST3?  Does that concern me the user or only people who code VST plug-ins?
 
Thanks for your help; sorry for the super-nerdy and boring question.
 

For years I battled vendor defaults in the name of file system tidiness and conservation of valuable C: space. And often lost those battles when software didn't work right or I ended up with multiple copies of the same plugin.
 
Ultimately, I surrendered that fight. Nowadays, I accept defaults for everything. It has greatly simplified things. Dupes still happen, such as when an installer doesn't give you the option of VST2 vs VST3 and drops both into place. But Cakewalk (mostly) transparently handles that by favoring the VST3 version. It still annoys me on an OCD level, having stuff scattered all about, but letting it happen is still easier than trying to enforce my own organization.
 
Because my C: drive is smaller than the other four disks, I don't want a lot of large files there that don't need to be there. The solution, as Steve notes above, is symbolic links. This allows me to physically locate large sample libraries wherever they make the most practical sense, without contradicting instruments' assumptions about where those files reside. All of my libraries, including Cakewalk, Spectrasonics, Superior Drummer and Kontakt are on drive E:, which is dedicated to samples. Someday I'll add an SSD for that role, and it'll be a seamless upgrade - I'll just copy everything over and designate the SSD as E:. But all the while Rapture, Kontakt, Omnisphere, etc. will be happily oblivious to where those files actually exist. As far as they're concerned, they're still on C:. 
 
 

Thank you all for your helpful replies.  Bitflipper - I am glad you have some understanding of my desire/need to organize my system drive - I understand I am swimming against the tide with this.
 
SCook - so if I understand you correctly, I can move the binary file of VST3 Z3TA+2 and CWbBL will still be able to see it - correct?.  Do I need both a VST2 and a VST3 version of Z3TA+2?  I suppose in the event I am using a plugin host that does not support the VST3 standard?  Thank you for suggesting directory junctions - I will do some research.
 
Thanks again.