Okay, I have seen the problem. The ID-tag in the file is different.
But, you can already open these with MultiEx Commander.
1. Get MultiEx Commander v4.01
2. Choose update from web from within the Commander.
You will now also be able to open Need For Speed : Underground 2 .VIV files. Just use this format to open the BFME files. To do this, first type *.* as filename, and then you can just select the *.BIG file.
I will implement it in a web update as a BFME *.BIG file and also include it in the next release.
Cheers!