The additional read only drive is fine.
2) Run checkdisk on it (from command line it is chkdsk /f <drive letter>, i.e. if internal memory is e: drive, command would be chkdsk /f e:
5) Repeat step 2 (yeah, 2 times are needed, reader likes to keep invalid file handles which damage file system again)
This will ensure that file system on internal memory is fixed. (this is the most common software problem that is causing reader to hang when being disconnected from USB).
So you should have empty internal memory (reader will create /database/... folder on it when you disconnect, it's fine)
It is VERY IMPORTANT that you don't lose folder structure! (some zip programs do it for some idiotic reason).
So ensure that after you've unzipped it, that your folder structure looks like this:
PRSPInstaller\Sony Reader\software\autorun.xml
PRSPInstaller\Sony Reader\software\data
PRSPInstaller\Sony Reader\software\firmware
PRSPInstaller\Sony Reader\software\installer.js
PRSPInstaller\Sony Reader\software\languages
PRSPInstaller\Sony Reader\software\piAssets.png
PRSPInstaller\Sony Reader\software\readme
PRSPInstaller\Sony Reader\software\tools
PRSPInstaller\Sony Reader\software\data\database
PRSPInstaller\Sony Reader\software\data\runonce.sh
PRSPInstaller\Sony Reader\software\data\database\system
PRSPInstaller\Sony Reader\software\data\database\system\PRSPlus
PRSPInstaller\Sony Reader\software\data\database\system\PRSPlus\epub
PRSPInstaller\Sony Reader\software\data\database\system\PRSPlus\folders.cfg.sample
PRSPInstaller\Sony Reader\software\data\database\system\PRSPlus\epub\FontsAsInLRF.css
PRSPInstaller\Sony Reader\software\firmware\300
PRSPInstaller\Sony Reader\software\firmware\300\Fsk.img
PRSPInstaller\Sony Reader\software\firmware\300\Fsk.img.md5
PRSPInstaller\Sony Reader\software\firmware\300\fw.ver
PRSPInstaller\Sony Reader\software\languages\Catalan.js
PRSPInstaller\Sony Reader\software\languages\Deutsch.js
PRSPInstaller\Sony Reader\software\languages\English.js
PRSPInstaller\Sony Reader\software\languages\French.js
PRSPInstaller\Sony Reader\software\languages\Russian.js
PRSPInstaller\Sony Reader\software\languages\Spanish.js
PRSPInstaller\Sony Reader\software\readme\readme.300.txt
PRSPInstaller\Sony Reader\software\readme\readme.350.txt
PRSPInstaller\Sony Reader\software\readme\readme.505.txt
PRSPInstaller\Sony Reader\software\readme\readme.600.txt
PRSPInstaller\Sony Reader\software\readme\readme.650.txt
PRSPInstaller\Sony Reader\software\readme\readme.950.txt
PRSPInstaller\Sony Reader\software\tools\libfskLoad.so
PRSPInstaller\Sony Reader\software\tools\prspVM.xml
2) If file structure is fine, disconnect the reader, wait for about 10-20 seconds
3) If installer doesn't start press page scrolling button (it will wake it up and let installer start)
At this point, installer should start and you can follow instructions on the screen.
Let me know, how it goes.
Regards,
kartu