Three ways you can handle this.
One, Right click on "Start", click "Properties", choose "Classic Start Menu", click "Customize", scroll down to the check box for "Scroll Programs" and check that box, click OK. This will allow all your programs to scroll top to bottom in one column although I don't know if this allows you to change back to the Windows XP and still maintain the scroll feature.
Two, increase your screen resolution to the next step up. Keep increasing until you can see all the program items or your card will not support any higher.
Three, this is the hardest one, but the most advantageous. Right click on "Start", click on "Properties", click on "Classic Start Menus", click on "Customize", click on "Advanced", double click on "Programs" in the right hand side of the window, create new folders to organize your programs as to what type/usage they are (myself, I created Applications, Utilities, Reference, Microsoft Office, and moved Games to this section). Start dragging your program folders into the new folders you created. Once you have organized your folders, close this window and click OK. Now right click on "Start" again, click "Properties" and click on "Start Menu" to bring back the Windows XP look to your desktop. Your menus will be shorter (mine is only 8 items long in Program Files) and all your programs will be available in one or two drill down positions.