I tried launching the Enhanced Edition of the first game but it only lets me select the main campaign or the Black Pits on the opening menu. I even downloaded Dragonspear again and ran the setup program that downloaded to be certain I have it. After running the setup I launched the game via the option after installation but I still can't find it on the menu.

What's odd is I thought I remember playing it on my old computer complete with its own shortcut but can't find any way to do so now.

Sorry but I finally figured it out. when I opened the game I clicked an icon that shifted it to The Pits mode. I clicked an icon next to that one which took me back to te main campaign. I didn't realize that another icon replaced the second one I had clicked which led to Siege of Dragonspear. Why they didn't just have three icons to be selected with the currently selected one indicated I don't know. Or why I remember having a shortcut leading directly to Siege of Dragonspear when there is no option to do so.