How can I let Windows XP read Mac OS Extended (Journaled) drives?
Boot Camp Drivers

You can use the Boot Camp drivers which integrates HFS read/write into Explorer.


http://support.apple.com/kb/DL830


You don't need Boot Camp to download/install the drivers.

HFSExplorer

Alternatively, you can use HFSExplorer:


  HFSExplorer is an application that can read Mac-formatted hard disks and disk images.
  It can read the file systems HFS (Mac OS Standard), HFS+ (Mac OS Extended) and HFSX (Mac OS Extended with case sensitive file names).