There is
Pocket Fallout but that's practically different game. I've not heard about project making fallout portable.
You could try out if you can either just copy the fallout directory over to portable drive/usb stick and run it or installing it on one. 2 things may cause problems : 1 wether or not game puts anything in windows registry durring instalation and 2. does it save games in game folder or elsewhere (like my files folder).
There may be problems with configuration files if they specify where some files are (datadirectory=driveletter:\gamedirectory\data etc.)because portable drive/usb stick may not get the same drive letter on different computer.
Edit just to make sure: are you asking:
1. way to carry and play fallouts from portable drive
2. way to port and run games on other platforms than windows PC
3. porting fallout 1 to fallout 2 engine