Giles had been afraid of that. If someone could figure out the spell, it would likely be Willow, but it could be weeks or even months before something was put together, and now they had a raging ex-Slayer turned vampire out in the woods who was likely to do anything that, with a soul, would just add to the many regrets she would likely already have.
"How much of the curse would you have to adapt?" Giles asked. He'd offer his help if she needed it, of course. He was less mad at Willow than simply at the current situation. He hated that they had given a soul to Angel first, even if he understood that they already had the spell for him and not Buffy. Plus, the kidnapping had sort of forced everyone's hand.