[NTG-pdftex] vim syntax for web files?

Hi, does anyone here use vim for editing web (knuthian web) files? Sometimes I got wrong highlighting with tex.web or pdftex.web, but I am not good enough to correct the vim syntax file, so I turn off syntax highlighting for *.web files. The web syntax file coming with vim is made for CWEB files but it is used for web too. If here is some vim guru who can fix that, it would be great. Thanh