What you can do :

Download Poser10 now. (If you did not keep the installation files)

That will be around 4GB in (from memory) 7 or 8 files??

Create a folder, "Poser10-Install" (you can choose the name)
Copy all the downloaded exe files in that folder.
And put it away on a USB stick, or external HD? whatever. (do not forget to add a small txt file with your serial number)

After the reformat, all you have to do is click the Poser installation exe file, and all files (the app and the content files) will install automatically in a single go.
And then install SR5.2 over that.
Done

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!