I just downloaded this one last night...I'd like to change the afterburner effect aswell.  I've been somewhat successful, however, is there a way to use teh default MS F18 effect?  Does it use a "light.xx" in the aircraft.cfg or is it part of the MS model?  Thanks!

No unfortunately they aren't....I've been playing around with it for the last couple nights.  I've swapped many different AB effects into the lights line.  another company, IRIS, (can't find the default one)... none of them work correctly...although the another company one looks awesome as it produces an incorrect flame...but I've deleted all of these and reverted back to original until I can find something more suitable...