The command on the fly-outmenu is a shortcut that accesses the “Create list” command followed by atemplate key. The default commands are created to use template from the 0category, which means "Advance". The solution is to modify the user interfaceand change the shortcut that button uses. This can be done by modifying theused CUI file.
To do this, you need toaccess the "Customize User Interface" dialog (by typing :"CUI" and press enter).
Here, go to :"Partial Customization Files / ASTCHECK / Toolbars / Sub - BOM". Inthis category, you can find a name for each of the buttons present on therespective fly-out. Go the button you need to change.
In the propertiessection on the right side of the dialog, you have: "Macro", whichcontains a value similar to : ^C^C_Astm4CommBomNew 75 0 . The textpart is the command the button calls, while the two numbers represent thetemplate key and the category. So, in this case this button use the template 75from the Advance category. Just change the template key and set the categoryfrom which your template is (0 is for Advance, 1 is for User). Save thechanges.
On the other hand,Advance Steel 2011 will bring a new feature called: Quick Documents, which is adialog that contains shortcuts to the often used drawing styles, drawingprocesses and BoM templates. This will allow the user to set exactly whattemplates he wants to see in it by simply going to BoM editor and checking thecheckbox associated to the respective template. This will eliminate the need tocustomize the user interface in order to set a button to use a specifictemplate.