Oh Joy... Well as you can tell out of the box RHEL5 doesn't support NTFS. To resolve this problem you will have to find and install ntfs-3g and fuse, then ./configure and make, make install to get ntfs support.
However you're very quickly headed to dependancy hell, you're going to need GCC or a comprable C compiler to set this up. I'm not sure about in RHEL5 but in RHEL4ES I also had to find the RHEL kernel headers and bunch of other dependancies before I could get this all to work.
You can do some more reading from this thread http://www.linuxquestions.org/questi...-rhel5-602883/
Fuse is available at http://fuse.sourceforge.net/
and ntfs-3g is available at http://www.ntfs-3g.org/
Your best bet for install GCC or others is 'yum install gcc' assuming you have yum installed. If not thats definately worth finding, as it should help keep you out of dependancy hell.