Trying to give something back to the Community...
Full Title: Network drives and network printers are not migrated when you use Microsoft Deployment Toolkit 2010 with the User State Migration Tool (USMT) 4.0
You back up the user state on a client computer by using Microsoft Deployment Toolkit 2010 together with User State Migration Tool (USMT) 4.0 that is included with Windows Automated Installation Kit (AIK) for Windows 7. However, items such as mapped network drives and network printers are not migrated from the source computer.
http://support.microsoft.com/kb/977565
Read the complete post at http://wmug.co.uk/blogs/cliffs_blog/archive/2010/01/15/ms-kbs-kb977565-network-drives-and-network-printers-are-not-migrated-when-you-use-microsoft-deployment-toolkit-2010.aspx