Simple Html search, store and replace script

[Stephen304]

I need to make a script that searches a page for a certain title, stores it, searches for a block of code, and replaces it with a link with the title in the link.

Ex.

Awesome_cool_thing.zip <----- Copy
<picture>
Oh noes!!! <----- Cut
www.place.com/downloads/Awesome_cool_thing.zip <------ paste


Could anybody help me out with examples of a searching piece of scrip and an example of how to store bits of stuff, and basically how to do this?