curious: iphone compiling?

[grimmwerks]

I'm curious regarding stuff like Chmox -- I've been able to install  
the Installer.app and a lot 3rd party software - including Ruby,  
Stumbler, etc.

What I'd REALLY like is 2 viewers for a lot of the digital manuals  
I've got - a good PDF reader, and .chm viewer. Though I've tried the  
Preview.app, it doesn't work for the pdfs I have   - but emailing  
them to myself does.

Now, if there's a way of compiling Chmox for the iphone that would rock.

On a different note - how does one add to the $PATH in z-shell?