The portable version of Strawberry Perl doesn't need to be installed and includes all the needed modules. It could be setup next to Python in the Inkscape\lib folder and added to the Inkscape configuration.
Write an install script to do these steps:
- Download the Portable Strawberry Perl zip file.
- Unzip it to the Inkscape\lib folder next to Python.
- Remove the C and CPAN folders and whatever else you don't want
- Configure the user's Inkscape preferences file to run the Perl Inkscape extensions by passing the Perl scripts to portableshell.bat.