Well, here is an effect that somewhat should do it (although I have only looked at it in the FXEditor):
[Library Effect]
Lifetime=5
Version=1.00
Damage=0
Hitpoints=0.00, 0.00
Magnitude=0.00, 0.00
Time=0.00, 0.00
Range=0.00, 0.00
[Emitter.0]
Lifetime=0.00, 0.00
Delay=0.00, 0.00
Bounce=0.00
No Interpolate=1
Rate=600.00, 600.00
X Emitter Velocity=0.00, 0.00
Y Emitter Velocity=0.00, 0.00
Z Emitter Velocity=0.00, 0.00
Drag=0.00, 0.00
X Particle Velocity=10.00, 20.00
Y Particle Velocity=8.00, 10.00
Z Particle Velocity=0.00,0.00
X Offset=0.00, 0.00
Y Offset=0.00, 0.00
Z Offset=0.00, 0.00
[Particle.0]
Lifetime=0.50, 1.00
Type=19
X Scale=0.02, 0.05
Y Scale=0.02, 0.05
Z Scale=0.00, 0.00
X Scale Rate=0.00, 0.00
Y Scale Rate=0.00, 0.00
Z Scale Rate=0.00, 0.00
Drag=-0.50, -0.50
Color Rate=0.50, 0.50
Fade In=0.02, 0.05
Fade Out=0.80, 0.85
Rotation=0.00, 0.00
Face=1, 1, 1
[ParticleAttributes.0]
Blend Mode=1
Texture=fx_1.bmp
Bounce=0.00
Color Start=255, 255, 255, 255
Color End=254, 255, 255, 0
Jitter Distance=1.00
Jitter Time=5.00
TempK=90.00
TempRate=0.00
uv1=0.50, 0.75
uv2=0.75, 1.00
X Scale Goal=0.00
Y Scale Goal=0.00
Z Scale Goal=0.00
Extrude Length=0.00
Extrude Pitch Max=0.00
Extrude Heading Max=0.00
[Emitter.1]
Lifetime=0.00, 0.00
Delay=0.00, 0.00
Bounce=0.00
No Interpolate=1
Rate=600.00, 600.00
X Emitter Velocity=0.00, 0.00
Y Emitter Velocity=0.00, 0.00
Z Emitter Velocity=0.00, 0.00
Drag=0.00, 0.00
X Particle Velocity=10.00, 20.00
Y Particle Velocity=8.00, 10.00
Z Particle Velocity=0.00,0.00
X Offset=0.00, 0.00
Y Offset=0.00, 0.00
Z Offset=0.00, 0.00
[Particle.1]
Lifetime=1.50, 2.00
Type=19
X Scale=0.02, 0.05
Y Scale=0.02, 0.05
Z Scale=0.00, 0.00
X Scale Rate=0.00, 0.00
Y Scale Rate=0.00, 0.00
Z Scale Rate=0.00, 0.00
Drag=-0.50, -0.50
Color Rate=0.50, 0.50
Fade In=0.02, 0.05
Fade Out=0.80, 0.85
Rotation=0.00, 0.00
Face=1, 1, 1
[ParticleAttributes.1]
Blend Mode=1
Texture=fx_1.bmp
Bounce=0.00
Color Start=255, 255, 255, 60
Color End=254, 255, 255, 0
Jitter Distance=1.00
Jitter Time=5.00
TempK=85.00
TempRate=0.00
uv1=0.00, 0.50
uv2=0.50, 1.00
X Scale Goal=0.00
Y Scale Goal=0.00
Z Scale Goal=0.00
Extrude Length=0.00
Extrude Pitch Max=0.00
Extrude Heading Max=0.00