as an0malaus said PrefsLocation is the best place to store config data

config = os.path.join(poser.PrefsLocation(), "3DCheapskate", "scriptname" )
if not os.path.exists( config )
    os.makedirs( config )
config = os.path.join( config, scriptname.data )

poser.TempLocation and poser.PrefsLocation are not subject to the UAC -

as adp pointed out "A running script inside Poser looks like Poser is doing something (same process, because Poser-Python is an integral component of Poser). Means: your script is able to write to all places Poser can."

however to check if UAC is a potential problem ( for writing anything to poser.Applocation ) # not usually a good idea to store config data here

def is_running_as_admin():
    '''
    Checks if the script is running with administrative privileges.
    Returns True if is running as admin, False otherwise.
    '''    
    try:
        return ctypes.windll.shell32.IsUserAnAdmin()
    except:
        return False

from sys import platform

if platform == "win32":
    import ctypes

    if is_running_as_admin():
        appLoc = os.path.dirname( poser.Applocation() )                     # Poser Main Directory
    # --- create alternative storage folder ---
    else:
        drive = "c:/"
        appLoc = os.path.join(drive,"Temp","Runtime","Libraries","pose" )   # build your path here
            if not os.path.exists( appLoc ):                                # check folder exists
                os.makedirs( appLoc )                                       # build folder if it does not exist  

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