This project http://mount-ntfs.sourceforge.net/ NTFS Mount (Solaris), UFS Reader (Windows XP) has released utils for NTFS support for Solaris and UFS reader support for Windows vice-versa so that you can access data across . The idea here is to use NFSv2 server that has the ability to read raw blocks from a block device and interpret the raw data as per the NTFS on-disk format. You can use the existing NFS client in Solaris to mount via the loopback interface.
http://blogs.sun.com/roller/page/pradhap?entry=mounting_ntfs_partition_in_solaris
