HELP: Accessing Linux partitions from Windows

[D G]

I am using Windows XP Professional (Service Pack 2) and Fedora Core 3.

I have three primary partitions: NTFS, Linux boot and Type 8E (according to 
Partition Magic). In the third partition, there are the Linux swap and Linux 
/  . But they are not recognised in Windows, neither by the disk manager nor 
by Partition Magic.

According to Linux, the partition / is in /dev/mapper/VolGroup00-LogVol00

Ext2ifs and Explore2fs only recognises the /boot partition. How can I mount 
the / partition?

Thank you in advance, and have a happy new year