about python modules

[srinivas]

hi friends i am new to python programming.
i am using Python 2.5 and IDLE as editor.
i have developed some functions in python those will be calling
frequently in my main method .
now i want to know how to import my functions folder to python in
sucha way that the functions in functions folder should work like
python library modules .

i have  python in folder C:\python25\..
and functions folder D:\programs\Functions\

pls help me friends how to do that.