Or there is CY6's 'real napalm' which gives the napalm a more realistic appearance, from the readme
"This is a little mod I whipped together that I'd like to share with the community
It always bothered me that the 'napalm' in the game was really just a different kind of bomb with a nice special effect attached.
This will turn the in-game Napalm bombs (75Gal, 110Gal, 154Gal, and Blu-2) into 'real' napalm bombs. On impact, these bombs will release a fan of flames that will destroy units in their path. The speed and angle of impact will effect how far the napalm spills, so low, level approaches are best.
Installation: Just unzip it in your "mods" folder. "
link here
https://www.mediafire.com/?kig4ei3ooan3a8lregards
slipper