See CGI#PROCESSING_A_FILE_UPLOAD_FIELD, http://search.cpan.org/dist/CGI/MANIFEST, Re: Perl/CGI Uploading file to the server using a upload hook is failing intermittently and this patch Bug #79102 for CGI.pm: PUTDATA/POSTDATA, uncorrupted by -utf8, and as tempfiles

If you can combine it, great, if you can't, sorry dude :)