Integrating jpgraph in codeignator

[eluser]Unknown[/eluser]
Hi All,

I am new to codeignator, As per my requirement i need to integrate jpgraphs in my codeignator project. I followed the below link for integrate jpgraph. But i am not able to understand below mentioned steps.

http://codeigniter.com/wiki/JP_Graph/

Installation
Setup

1) Download JpGraph (I used version 2.14 for PHP5) and copy the contents of the “src” folder to the “system/plugins/jpgraph” directory.

"I downloaded jpgraph. But here i did not found any system/plugins in jpgraph folder"

2) Create a directory “temp” in your document root (same directory as your index.php) to store the generated charts. Make sure this directory is writable by Apache.
3) If you use mod_rewrite, add the “temp” directory to your .htaccess exclusion list. My .htaccess file now looks like the following
" I did not understand step2 and step3"

So please give me a clear procedure for integrating jpgraph in codeignator.
As it a quick project. So please send the replay ASAP.

Thanks and Regards
Shankar.