Thank you Bristol_Jonesy, I saw that it was an exe. but all it does is open text files.  

The only difference I see is that my part 4 is 10kb less at 1,013,525  Is that a typo on your end?  

I am a little disappointed that none of the bakers have stopped in to help me out here. ?

You should be able to click on file 3 in order to start this one up again. I read this in the forum somewhere.

Danny

Here is what I saw:


'Dir /a'
 Directory of H:\Software Installations\2012-09-20\Sonar X2 Producer


2012-09-20  09:18 AM            32,274 00_SONAR_X2_Installation_Instructions_Link.rtf
2012-09-20  09:18 AM         5,400,974 01_Read_This_First.exe
2012-09-20  02:20 PM     2,060,726,523 02_SONAR_X2_Producer.part1.exe
2012-09-20  02:17 PM     2,059,309,329 02_SONAR_X2_Producer.part2.exe
2012-09-20  01:05 PM     1,215,056,718 02_SONAR_X2_Producer.part3.exe
2012-09-20  12:31 PM     1,037,848,613 02_SONAR_X2_Producer.part4.exe
2012-09-20  06:06 PM     1,388,621,747 03_Loops_And_One_Shots.part1.exe
2012-09-20  06:38 PM     2,066,833,245 03_Loops_And_One_Shots.part2.exe
2012-09-20  05:43 PM     1,151,492,593 03_Loops_And_One_Shots.part3.exe
2012-09-20  04:56 PM       819,313,675 05_SONAR_X2_Producer_Additional_Content.exe

Explorer shell image:

Please note the following:

• If all of the parts are present and in the same location, the other parts will launch automatically after Part 1 is complete.
• If the installer cannot locate the next part in the series, it will prompt you with the message, "Installation is not complete! Please download and run Part 2/3/4". If given this message, simply run the next part in the series of files.

This was in the download info in support.

Danny

After you click on the first part, it should extract files to your temp folder.
To see the files extracted, do this before you start the install (while the installation program is waiting for your input):

Go to Start menu and click Run... and then type 

%temp%

then OK.

Windows explorer will show you the TEMP folder and you should see something like this:



I copy these files and folders to save them elsewhere, then if I need to run Setup in the future I don't have to extract all these again.

MD5 Hashes of these files:

883cd29b50fe89160388d563fa2efcf9 *.\Setup.exe
587f0cc0562d8aeaf3b821db9621074b *.\Setup-1.bin
5d56a1b47e25c99c4297f4c998bde808 *.\Setup-2.bin
dddbaf6834ce892a013df7aedf32b99e *.\Setup-3.bin
df1af3787572a7fbcad9492b304bea76 *.\Setup-4.bin
f9a9360a1d73acaf43b58094f7a9bbea *.\Setup-5.bin
fcd5b35ddef1ca66f4dda5827a48c606 *.\Setup-6.bin
85c224b220fd3f0d0c9b2c1febfac3fa *.\Setup-7.bin
c2f937b1b6bed241f55287115edffe24 *.\Setup-8.bin
025a8df408193c0a986961447c64de41 *.\Setup-9.bin
dd73003ee373e4f5be7571ee5e9a16b2 *.\Setup-10.bin

I called tech support and Dean Was helpful, he said it sounded like part 2 was corrupted by my anti-virus on the laptop I downloaded it on before I even got it to my DAW.  As he instructed, I turned it off & re-downloaded the file and it worked, then I had the same problem with part 4, repeated and I think it is now installing as expected.  Fingers crossed!