Good practical book. I would use the 2nd and 3rd rituals without change. But the first ritual you can use it as it is, or change the structure to something you’re more comfortable with.
For example, with the 1st ritual you can use a short version of the opening ritual. You can find it in Archangels of Magick by Damon Brand. You can also skip the petition paper or use a sigil of desire, the classic sigil creation from chaos magick.
The first ritual also may not work for cursing. It’s best used for attracting what you want. I suggest that you repeat the ritual at least 3 times for best results.