U can get the patch here, but u need a patecher for it.
f*p://ftp.pt.ea.com/QA/pub/easports/patches/nfsunderground/pc/us/NFSU_US_PATCH_4.RTP
Manual patch tool
http://games.saix.net/localdownloads...how&p_file=502
Manual update procedure.
1. Download patch files for SGS File Vault
2. Download the Patcher program
3. Copy both files into the NFS Underground directory
4. Rename NFSU_EUROPE_PATCH_2.RTP to NFSU.RTP
5. Start the pacher.exe
6. Done
7. For other updates repeat the process