Image manipulation requires graphic libraries such as ImageMagick or GD.

Perl modules provides bindings (interfaces) to this libraries.

I dont know so much about Windows systems, but under almost every sort of Unix system you can export a variable to point to a shared objects directory outside the main directories (LD_LIBRARY_PATH vs. ld.so.conf in Linux, for example). Maybe you can do something similar under Win, and then install Perl modules in another directory you own.

If this is not possible either due to Windows design (again, i dont know so much about this), or due to company policies, you can allways use statically compiled versions of programs that manipulate images and use them from your Perl scripts.