lightning effect

i have seen this tutorial which tells you how to create sparks between wires. see:

http://www.thinkdan.com/tutorials/photoshop/wiresparks/index.html

i have a wires graphic ready to go but i have photoshop 7 whereas the tutorial is aimed at 5.5. i cant seem to get this effect to work. for instance in step 2 Dan says:

Image>Adjust>Levels,
Image>Adjust>Invert

yet he doesnt say what level adjustment settings i need.
sorry. also i am a beginner with photoshop. i am not being lazy i.e. have tried playing around trial and error but cant seem to get the effect he is showing. can someone give me some more accurate instructions for creating this effect in PS7?

thanks bubba

Do the instructions this way instead:

Filter>Render>Clouds
Filter>Render>Difference Clouds
Image>Adjust>Invert
Image>Adjust>Brightness Contrast

Bring down the brightness about half way...and move the contrast up about half way (give or take depending on what you want it to look like)

thanks rodder. i got there in the end using a mixture of different flares. ended up nothing like the original i was trying to copy but that's the beauty of photoshop.

if you want to see my end product its here: www.fidgetbrain.com

cheers bubba