It's not the ballasts that are modified, it's the the lamp assm and solonoid on the lamp itself. Carefully review this tread from the first page. If you understand it, go for it. If confused, you might want to think hard before starting down the path.

The conversion from tele to tilt is in this tread a few pages up. I think it looks more intimidating than it is. The first step is to adjust the HID source position for proper low beam formation. This will involve a adjustment to the lamp/collar assm (you can see in the images). Next is limit the tele motion from about .250in to .170 inch. You will have to check this motion as some lamps may have different travel. This may well be enough to provide you with a high beam you like. It's easy as it's done by adding non magnetic spacer(s) to the motion solenoid. A third step is to dremel the guide grooves in the lamp and add a stop to limit the tele further and induce the tilt.

Once you take them apart, they are not that complicated. That typed, you need to be a person to be able to understand motion relationships and proceed carefully as once you remove material, it may be difficult to put back.