I will start from scratch....

First I have windows.. and I have to 2 Partitions, C: and D: My windows xp and other programs are installed in C:, Now I've installed Ubuntu inside windows xp under C:

So I have 2 OS now and Ubuntu as the secondary OS. And now I have 2 bootable OS.

I run ubuntu and go to My computer. I still have 2 partition but now it is name as: Filesystem and New Volume. I know that "Filesystem" was C: and "New Volume" was D:

Now my problem is this, How can i view my "windows file"?

When I go to /filesystem/mnt/ windows is not there
even on /filesystem/media/.....
how can I view my windows file?...

and finally how can i merge my windows and my ubuntu? or how can I erase "windows xp OS" and still retain my documents inside it...thanks..