Shockwave affect friendlies

I've got 2 questions.
Firstly, how do you make shockwave damage allied units? I tried turning on the "Friends" under targets allowed but it doesn't work. Anyone know how? I need it for blademaster mod (check signature).
Also, can anyone help me do a bullet "hit through" effect? Basically everytime the unit attacks, it fires a shockwave, thus making it hit anything along the way to the target. I know it involves giving a unit some orb that casts the ability, and I've done it once but lost the map. Then when I try it again, it either doesn't work or just crashes. Could anyone post a map here with the orb ability? You can tell me in detail how to do one too, but a map is much better. Thanks. I know you guys will be helpful.

I don't happen to have a map handy, but you should be able to attach any spell that targets a unit (and maybe a spell that targets a location) to the Orb of Slow item ability. Make a version of your spell that has no mana cost and no cooldown, and then refer to that from the Orb of Slow Item ability, and give the Item ability to your unit. However, it will show the DIS icon of the Shockwave spell in the command card, for no good reason.