How to server pulpTunes under a web site directory, withough having to append the port to the URL
Short answer: No.
pulpTunes is fully supported on Snow Leopard, needs some tweaking in Leopard, and it's not supported in Tiger.
This article explains how to run pulpTunes from the command line in Mac, which might provide a little info when there are problems.
The Linux functionality was thought for people having an existing iTunes library in a PC or Mac, and that want to host that same library on a Linux server with pulpTunes.
How to modify pulpTunes default template, if you know your way around HTML and CSS
So you want to run pulpTunes 1.3 and maybe newer upcoming versions? This is what you need for your PPC running 10.5 (Leopard)
List of known issues that will be fixed in a future version (or that can't be fixed)
How to let pulpTunes automatically configure your router so you can use pulpTunes from outside your home
This is a cool new feature coming up in version 1.2.1 For example you want you can type "pulptunes I gotta feeling" in your browser's address bar, or see a list of songs containing the word "acoustic" by just typing "pulptunes acoustic" (Only for Firefox)