Presuming you can get to the command line (otherwise, this is even HARDER!), do this:

# start with perldistro in whatever.tar.gz
$ gunzip <whatever.tar.gz | tar xfv -
$ cd whatever-just-got-unpacked
$ ./Configure -ders -Dprefix=$HOME
$ make all test install
[download]

You now have $HOME/bin/perl!

-- Randal L. Schwartz, Perl hacker