get a file from document and settings

i'm a flash designer and with this flash i can create some sort of cookie
this cookie wil be stored in documents and settings

i now exactly were the cookie is been stored the only problem is how can i receive it because
i have to pas a map that has the username from the person thats online
for example with me it is

c:/documents and settings/davyquyo/ .....

is there a way to receive that some sort of cookie in this map
because when i'm going to use this litle program on other pc's this name of this map won't be the same

i hope you understand me