Not true. You only need DVD decoder software.
for winXP:
First go and download DVD decoder software like WinDVD or powerDVD.
(don't buy it, just download the free trial)
Then download the "Windows XP Video decoder checkup utility"
Download details: Windows XP Video Decoder Checkup Utility
install the DVD software.
install the XP video decoder checkup utility.
run the video decoder checkup utility.
This will give you the name of your decoder file, search your hard drive for that file and open the fold that contains it.
copy all the files in that folder to another folder (on your desktop or something -- you only really need the files with the same extension as your decoder file.)
uninstall the DVD software.
use regsvr32 to register the files you copied.
Now you can play DVDs in windows media player, and closed captioning is also supported, (if you did this correctly)