You can add images as ColorIcon widgets, first you need to convert your image to a .xpm. There's a few free online tools to do this.
Store.StringAt.LogoPath = "/usr/local/adacnew/PinnacleSiteData/Scripts/LCTCMCTC_Menu";
Store.At.LogoPath.AppendString = "/lctcmctclogo6.xpm";
Store.At.LCTCMCTCWindow.AddChild = "";
Store.At.LCTCMCTCWindow.WidgetList.Last = {
ParentName = "TopLevel";
WidgetClass = "ColorIcon";
X = 2;
Y = 2;
UseDefaultSize = 1;
QueryValueKey = "Store.StringAt.LogoPath";
UseQueryForLabel = 1;