[ubuntu-in] How to merge two separate OS 10.04 and 10.10

[Sriranga(78yrsold)]

I had installed Ubuntu 10.04 on one of drive. when tried to install
ubuntu10.10 on the
old ubuntu 10.04, unfortunately instead of upgrading from Ubuntu10.04 to
Ubuntu10.10,
separately  installed on another drive or partittion. Thus i have two ubuntu
10.04 and ubuntu 10.10. Now I want to merge by deleting the old ubuntu 10.04
with ubuntu 10.10. Unable to know on which drives both ubuntu were
installed. . I have Winxp  which is working fine.

Question is how to merge the space used by Ubuntu 10.04 with Ubuntu 10.10 so
that I can have more
space in home of ubuntu 10.10 - (after uninstalled 10.04)
Since I am newbie to linux, I seek valuable guidance for which i shall be
thankful to you.
With regards,
-sriranga(78yrs)
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