Not a problem, in fact, really easy to sort out.
Use the Wireless Network Wizard included with Windows...J/d.
Or, log on to the dongle's configuration page, and enable file sharing in that, and then right click the folders you wish to share, go to "sharing and security" and configure to share it, and sorted.
So I'm paraphrasing, and might have got the exact words wrong, but it is quite straight forward.