/opt/local/lib/---What is this?

[punit12]

Hi- I;ve followed instructions on another forum to jailbreak 1.1.2- and then it said this:

"Q) When I try to jailbreak 1.1.2, I keep getting an error telling me to connect my iPhone, but my iPhone is connected!
A) Okey, you are missing a crucial library file. Download the library (Click Here), then extract the zip file. Now copy libreadline.5.2.dylib to /opt/local/lib/ on your Mac. The Jailbreak software should work now."

How do i copy a file to "/opt/local/lib/"
??
Thanks!

[GreggSymington]

did you forget to install oktoprep before you upgraded to 1.1.2?