Just open it in notepad or even better the Script Editor that comes with GS. You'll see something like:
// The PATH keyword gives directories where template files can be found.
path "%WEDPATH%\\template_6"; // Path to A6 templates directory
path "%WEDPATH%\\template_6\\code"; // Path to A6 template code subdirectory
path "%WEDPATH%\\template_6\\images"; // Path to A6 template image subdirectory
path "%WEDPATH%\\template_6\\sounds"; // Path to A6 template sound subdirectory
path "%WEDPATH%\\template_6\\models"; // Path to A6 template model subdirectory
/////////////////////////////////////////////////////////////////
// Filename of the starting level.
string level_str = <%NAME%.WMB>; // give file names in angular brackets
So change all the "%WEDPATH%\\template_6"; to something like path "C:\Program\GStudio6\template_6"; depending on where you installed it.
And also I don't remember if level_str is changed automatic, or just change it to <yourlevelname.wmb>
