Can u link me... i click on the file... n it directs me to login page... or register thingy....
You should be able to download files without registering.
http://fallout3nexus.com/downloads/advancedsearch.php
Use this search engine. Type some word(s) to the search field and click OK.
It should leave some search results to the screen if found any.
For starters write "Teddy Bear" (without quotation marks) and hit OK.
It should give you 5 search results.
Scroll down the page and you should see a file named "Teddy Bear Weapons". Click on it's title.
This should take you to the mod's page. Now, click on "files" which is some three inches under the theme picture of the mod.
There you see the downloadable files. Click on the file and it asks you where to save it. Save it to desktop.
Open the file you downloaded, and while at it open your Fallout 3 folder, which means the place you installed the game in.
There, open "Data" folder, and put the files in teddy bear weapons file there.
Now, launch Fallout 3 Launcher, and click "Data". This should open a list of Data files to be included. Select the mod's file, click OK and start Fallout 3.
Tah-da, you got a teddy bear gatling laser in your game!