By "mapping a drive" you can easy return to a network folder without having to re-enter the path each time.
Windows XP
http://support.microsoft.com/kb/308582
Connect a drive from My Computer or Windows Explorer
1) Tto connect a drive from Windows Explorer, right-click Start, and then click Explore.
2) On the Tools menu, click Map Network Drive.
3) In the Drive box, click a drive letter.
4) In the Folder box, type the UNC path for the server and shared resource in the following format: \\server name\share name. You can also click Browse to find the computer and shared resource.You can map shared drives and shared folders. When you access a shared drive or folder you can also access subfolders if you have the appropriate permissions. However, you cannot map a drive for a subfolder that is not explicitly configured as a shared resource.
Mac OS X
-From the Finder select "Go"->"Connect to Server..."
-Specify "smb://servername/..." in the server address.
-Authenticate with your Windows username and password.