2 Operating Systems?

http://neosmart.net/dl.php?id=1

QQ >.<

So i downloaded Neo Program and deleted the Windows on the 80G, the one that went to an error page if i tried loading it. Then I rebooted to see if it would still ask me 'which windows would you like to load?' ....and ERROR. It wouldnt load Windows 7. So, I poped in my W7 CD and installed it into the 80g so that i wouldnt have to format my 640G and delete everything on it. Well, after finding my LAN network driver on a different computer then installing it onto this one, I was finally able to get on the internet.

Anyway, right now I have W7 running out of the 80G, and everything that was on my 640g is still there. however, if I cant run any of the programs on the 640g because my OS is on the 80g. I can play movies or music, because WMP is on the 80g and it is just loading the data into the program(WMP). But if I try to run DiRT3 or League of Legends from the 640g, it wont work, im assuming because it is an entirely differnt program and its not on the 80G.

So, what chooses do I have?
I can't really see me having only 80G of space for my games/programs. So, should I just format the 640g and just try to reinstall everything or is there a way to slave the 640g and make programs run from the 80G?

Any other ideas/advice? I really don't want to format the 640g and have to download everything again... if i dont have too. but if its the best thing to do then, im all for it.

I will loose my DiRT3 saved game and my other saved games if i reformat the 640, right? Could i transfer the files to a Portable HD and still have my saved games?

Thanks in advance.

I have used EasyBCD several times in the past and never had any issues with it at all. If you just removed the Windows XP line, it should have not affected anything else. Did you have your hard drive boot order backwards?