Hey John,
The best way to save more spaces for your SSD is to do a clean installation meaning setting up a new windows and install all of the required drivers which can be found from this link (
http://rog.asus.com/forum/showthread.php?5224-Drivers-Apps-and-How-to-s). This way, you don't get to get all of those bloatwares thattake up the limited space you have.
But if you want to just remove the hidden recovery partition, I believe you can go to Computer Management. It can be accessed through My Computer by right click on My Computer and choose Manage, then a new window appears and choose Disk Management. In that tap, you'll see an unamed partition (mine is 25GB), then right click on it and choose Delete Volume. It will confirm you if you really want to do it, choose yes if you are sure about it. It'll take about a few minutes (depends on your laptop), then it will become a free partition. Go to your Main windows partition drive (which is usually drive C) then right click and choose Extend. This extend will let you add the free partition into your Window partition and it will take some time to do so. Wait for it to finish then you sucessfully add more spaces.
Still, I would recommend do a clean install 'cause that way will save you more spaces and you don't have the left over bloatware on your SSD. You can take a loook at this link (
http://rog.asus.com/forum/showthread.php?22210-Clean-Installation-for-Asus-G74Sx-BBK8/page2), Pilgrim listed all the required drivers for new windows and those drivers can be downloaded from Asus website.
Hope this is the answer you're looking for.