OS X natively reads NTFS, but it cannot write to it. Aside from Paragon's solution which you probably saw in the 2008 threads, you can try the freeware NTFS Mounter. I haven't used it in a long time and do not know if it still works on recent versions of OS X, however.
Edit: I also found a driver released by Tuxera (who also sells a "professional" version of the same thing) that allows NTFS read/write on OS X. The last stable release was January of this year.