Party/skins graphics on Inspiron 9200 WXGA Monitor

[Lmn55d]

Hey guys, I just got a Dell Inspiron with a 17 inch wxga, monitor with resolution of 1920x1600. The only problem is that the windows in party skins aren't sized correctly. The windows for the lobby and tables are bigger than the graphics they contain. For example, the lobby window has a section on the bottom and right of the window that is black. The actual lobby graphic only takes up about 75% of the window. Is there any way to get the window to fit exactly around the graphic?