Ok, here we go:
you're going to have to use telnet/ssh to do these things. Check out the K-base articles for telnet and what programs you can use to do that.
Next you'll need to get the perl module onto your DH account. You'll probably want to just put them in your home directory. Once you've gotten this far, I think you should being to have an idea of how to carry out these commands that the instructions are talking about.
If you have a direct download like for your perl module, you can just copy the url and type this at the shell prompt:
"wget http://www.domain.com/path/to/file.tar" just past in the link and it should download it. (without the quotes)
Next you'll need to unpack the file (like un-zipping, but this is for tar or tar.gz, or even bz2 archives) The command you'll run depends on the type of archive. If it's a plain old tar then it would look like this:
"tar -xvzf perl-script.tar"
next you can move into the newly created directory like so:
"ls" will list all the directores and then use "cd directory" to move into that directory. There's probably a README file in this directory that will help with install instructions. open it like this:
"pico README" (yes, things are cAseSensiTive here)
you can press ctrl and X to quit once you're done.
Now just follow the instructions you've got to install this script. The only thing you'll have to figure out how to do, is specify where the files are to be installed to. the default will be folders on the server that you don't have access to. If the instructions tell you to use ./configure as the first step, then to specify the install directory you'd just type:
"./configure --prefix=/home/username/some/folder" and then follow the rest of the instructions as normal.
Take your time here, it takes a bit to figure out how this stuff works. Post back with specific problems. Tell us what all you've done so far, and what you're doing that produces exactly what error (copy and paste if you can). Be as specific as possible, as that will help to bring understanding of your problem.