Uasset Renamer

[FluffyQuack]

This tool lets you replace files with other files (a direct copy isn't enough as the game checks if the filename matches the filename in the file header).

Download: www.fluffyquack.com/tools/UassetRenamer.rar 
Source code: www.fluffyquack.com/tools/source/UassetRenamer.rar 

Usage:
UassetRenamer [file to take id from] [file to be edited]

It'll generate a new file ending with "new" in its filename.