I have to assume you are using kde4.
If there is a launcher for the application in the menu, with the desktop widgets unlocked (right click the desktop)
Find the launcher in the menu and drag it carefully to the panel.
Use the cashew in the right corner to expand the panel and you can then move the launcher where you want it.
If you click on the link and watch the short animated gif, you’ll see a “K” icon on the left-hand side. I’m assuming if you have KDE 4 installed, that icon will be there on the panel. This is the Application Launcher.
If Widgets are locked, right-click the desktop, and click “Unlock Widgets”. There’s a short animated gif showing how: “Unlock Widgets”.
The procedure for adding a widget to the panel is different then adding an application to the panel. When you click the Application Launcher, it expands. Find the application you want to add, right-click, and on the menu click “Add to Panel”. If you just wanted the application on the desktop, you’d left-click and drag it to the desktop. If you don’t want the Application Launcher widget on the panel after you added the application you wanted, just remove the Application Launcher widget.
Similar to this procedure: Remove widget 
You mention Ubuntu. Ubuntu’s desktop is Gnome. Ubuntu doesn’t have a KDE desktop per se. They have another distribution called Kubuntu. With OpenSUSE, you install OpenSUSE and select which desktop GNOME, KDE, XFCE, etc.
I’m not sure if I understand the question 100% right, but if you want to add your own “shortcut” of an application to the existing kde4 menu you can just right-click on the menu icon and choose menu-editor, then create your custom entry,any way you want it (parameters/working dirs/icons…).
Here’s how it’s done.
Let’s start by saying you want to install an app called PCToaster OK?
1.right click the Kmenu
2.select Menu Editor click that
3.Now let’s say you want to put PCToaster in Utilities, select Utilities from the left pane in the box that shows up click Utilities
4.Click New Item in the tool bar
5.a box will show up Item Name Type in PCToaster click OK for Name type PCToaster, for Description once again type PCToaster
6.in the Command click the floppy icon in your case select Root from the left pane & click the OK’s until you get to where you can start PCToaster select it click OK
7.click the Save in the toolbar watch & wait for the update configuration,close Menu editor
8. Done! If all has gone well you’ll be able to go Kmenu>Applications>Utilities> PCToaster click that & PCToaster starts
I think that’s what you’re after.
Finally I see that you’re new here Welcome to OpenSuSe & its Forum Hope you like us!
I should have mentioned at the start, I am using openSUSE 11.2 KDE 4.3.1 running on VirtualBox. (I am trying a number of distributions.)
The above looks like it should work, but after step 7 I get a DialogBox with a ProgressBar which displays “Updating system configuration”. This gets to 95% then jumps back to 5% and repeats until I cancel. This happens with any change in the Menu Editor, even if I Save without making any changes.