please tell me where i can get NFS MW 1.2

Ask to google, we can't share ISOs for the game, sorry :(

you cannot, 1.2 doesn't exist sorry

Step 1: Buy the game Step 2: Done

Literally any hard copy of NFS MW (except Japanese version iirc) is on 1.2. There are dozen's of hard copies still around. If you don't feel like buying it, I would advise to not run the game if you literally don't have it. If you have Patch 1.3 installed, visit the Resources Tab for the downpatcher and everything else is self explanatory