You just need to expand the partition boundaries to utilize the larger hard drive. The 2.5Xtreme image only accounts for about 24 hours of recording capacity. There is a prompt during the Xtreme installation that asks you if you have a larger A drive. You apparently answered no to this which is why your drive is not expanded to full capacity. You can either reload 2.5Xtreme or expand your drive with MFS Tools 2.0 per the above post.
Please don't PM me or any other members looking for personal assistance. You'll do better by posting (after you've exhausted the search feature, of course) and taking advantage of the collective expertise of the membership instead of a single individual that may or may not be able to help you. Thank you and enjoy your stay at DDB!