Without knowing which module or modules, it is a little difficult to give specific advice; however, you may wish to review some of the postings in the Tutorials under the Writing, Installing, and Using Perl Modules section.

If you have telnet/ssh access to the machine, installing a module (either local to your account or system-wide if you are an administrator) should not be too difficult; however, if you only have FTP access, then things become more "interesting", since some modules require compilation (thus why I inquired which module/modules you were concerned about installing). To this point, I know there have been several postings within the last year, but the only one to come to mind immediately is Convincing ISP to install a module, which might be helpful. (My appologies for not recalling the others.)

Hope that helps somewhat.