Welcome to MeraWindows , Saurabh and thanks for the tutorial.
Yes as ankur said , first upload whatever picture you want to some image sharing host , it''ll provide the link. And that link you insert in your post using insert/edit image option here while posting.
And coming back to your tutorial , you can also compress any file/folder in Windows XP by just right click on that file/folder and using the send to option compressed (zipped) folder as shown below.

So i have uploaded this screenshot to a image sharing host and provided the link here to display.
And be active here saurabh with your more posts !