Neeraj
I know this works with Grand Prix 3.
Download the No-CD patch.
I downloaded to My Documents folder on my desktop. After download go to your desktop and open your My Documents folder.
There you will find a file called Gp3-113-noCD.
Press the right mouse button on that folder and press extract all.
Extract it to another folder in My Documents.
When it is extracted press mouse button (left twice) and open the extracted folder until it is highlighted.
Press once on the chequered flag icon.
Then go to the top toolbar on the screen and press EDIT scroll down and highlight copy to folder.
Copy to your Microprose/Grand Prix 3 folder.
It will ask you if it can copy over a folder that already exists, just press yes.
Hope this helps.