im tired of walking around so are there any vehicle mods that allow you to drive them?

Right on the very first page, home page of newvegas nexus is a picture of a driveable motorcycle on the "Hot Files" picture rotator plugin
.......don't even have to search, just click on the picture

I tried it but the motorcycle never moved

Do you have NVSE installed?

From the J3X page
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How to use the motorcycle

1. You need to be holstered and in run state to ride the motorcycle
2. press e to mount/dismount the motorcycle
3. DRIVING INSTRUCTIONS:
- Drive with WASD or whatever you have chosen as up/down/left/right.
- Use Jump (Space) for turbo boost if you install the LEAKING GAS TANK.
- Use Use-key (E) to get out.
- B for horn if any
- Z for toggle light if any.
- H for toggle free camera / steer with mouse.
- = for experimetal movement scheme (this make you movable in TFC, typing tfik for best performance with this scheme)
- arrow keys for moving the camera in TFC mode.

- Fire weapons with left mouse button if any.
- Turn weapons with right mouse button if any.

For more detail information you can refer the original FO3 mod page (or see the motorcycle note in game)
http://www.fallout3nexus.com/downloads/file.php?id=6005

Also http://newvegasnexus.com/downloads/file.php?id=37083/