You mean you want to access "shared files", files that are on your computers hard drive that u have set up to share over the local area network?
If so, that is easy to do.
I use
GSFinder, which is a free file explorer with more features. It acts more like the file explorer in win xp.
In GSFinder you get an address box, like you would on win xp's file explorer.
Simply type in "\\PC Name\Shared Folder Name" into the address bar of GSFinder. I assume you already know this path if youve set up your xp pro system to share files. If not, reply and ill show you how to set it up and find its name.
Once you enter that address and are connected to wifi, it should let you in.
You can also make a shortcut to it by going up one level to "\\PC Name", copying the folder and pasting a shortcut wherever you want it. I keep a shortcut to my network drive in /My Documents on my pda so that i can get to it easier.