If you're new to dnn, the first thing I would do is learn to search the forums using the following url to do so:

http://search.conduit.com/default.aspx?&ctid=CT918057&si=http://www.dotnetnuke.com&SearchSourceOrigin=1&Name=Search%20dotnetnuke&SelfSearch=1&hl=en

There are enough post on installation enviroments, install instructions for the starter kit, install, and source versions of dnn 4.5.1, 4.5, 4.4.1, 4.3.7, etc, to make your head swim.  I'm not trying to discredit your post for help, I just believe that even as a "newbie" you must take the plunge and learn to use the available tools to find answers.  It serves several purposes:

1) You gain a better understanding of how to find the information you need and you will need a lot of information over time to start to get your head around dnn. Installation is just the first step.

2) You don't discourage all the folks who have already detailed these types of request in previous post from continuing to contribute to the overall knowledge base that these forums provide. By continuing to contribute - I mean their not frustrated at answering the same questions over and over again.

3) Finally, if you use the available tools (forums-install documentation), get your first portal up and running, and continue to use the tools after installation to become more knowledgable, you can pass this "jump in and get your feet wet philosophy" onto other newbies and encourage them to use the available tools also.

Hope this doesn't sound like a harsh response to your post and just to soften it somewhat I will attempt  to provide the info you requested in an attempt to help you get started.

Yes...download the latest starter kit and also the install doc's for the 4.4.1 version.  These docs are also relevant to the 4.5.1 starter kit.

On your XP Home machine - you may have to disable simple security to get access to the security permissions needed to run the app.   The aspnet machine account will at least need modify priviledges.

Make sure your dev environment has everything you need.  A simple environment that has worked for me is VWD Express and SQL 2005 Express with aspnet 2.0 running on the machine.

Unzip the starter kit and install the solution by simply double clicking on the content installer file.  If this installs without errors, you should be able to open up VWD Express and choose create new website and see the DNN Web application file listed. Choose that and if you are going to use file system, you will need to use the built in web server (cassini) to run your app.  This happens by default so you don't really need to do anything here. If the files load in the solutions explorer, delete the web.config file and rename the release.config to web.config.  From the VWD file menu go to view and choose to view output. Do a control F5 and let the app build.  It should build without errors and the install should begin and complete without any problems.

I may have forgotten something so please read and re-read the documentation that I referenced.  I hope this helps and welcome to DNN.

Paul