Guys "My Computer" is available in kde4...just not by default. In PCLOS it's package name is "kio-sysinfo". I don't think the packaging for this app has been completed so you'll have to create a .desktop icon for it in /usr/share/applications/kde4. It also needs to be associated with Konqueror...which is what it's suppose to use for displaying the info.
Once you install the package manually open Konqueror. In the address bar type in "sysinfo:/" (no quotes) and nothing else. This should bring up the interface for My Computer. If you see it, then your on your way.
I think the best way to make this work the correct way is to create a profile in Konqueror. Profiles configure Konqueror to display itself for different purposes. Such as a file manager, Web browser, or anything in between. First make Konqueror look the way you want it to look by disabling menus, toolbars, location bars. Then (in Konqueror) go to "Settings" and then "Save View Profiles As...". Save this profile as "sysinfo". Ok that's done.
Create a .desktop file in /usr/share/applications/kde4 so you have a menu item for "My Computer". I would think it's easier to copy an existing .desktop file, rename and edit the contents of the file with your text editor. The most important lines is the "exec" and "category". If you want this "My Computer" icon to show up in a specific menu category you may want to look through the menu before you make this .desktop file and see what else is in the menu under the category that you would like to see your new "My computer" icon to show up in and then go to /usr/share/applications (/kde4 if it's a KDE app only) fine that existing menu entry, copy that, then modify it to be the "My Computer" file.
Anyway since you already created the profile in Konqueror you can now add the 'exec" line to the newly created .desktop file. That would be "konqueror --profile sysinfo sysinfo:/"
That should do it. The My Computer icon (or whatever you named it) should show up in the menus and display in Konqueror using the "sysinfo" profile.