Writing to the NTFS partition is turned off be default anyway, so you shouldn't have too much of a problem...
I think mine's under /mnt/windows
if not.. here is a fun way to do it yourself
first make a directory, maybe under /mnt, maybe no.. i put mine under /mnt..
call it something fun like... windows.. or win.. or whatever you want it to be called
then in console type
ln -s /dev/haX(where X is your windows partition) /path/to/where/you/want/your/windows/mounted
remember, when you mount stuff in linux, you mount the filesystem, basically... not necissacaraly the drive..