Well, that's cured in Pathfinder; not only are alignments less specified (something I like less in some cases, actually), but lycanthropy only comes with an alignment change with DM fiat it seems.
Here's an attempted merge:
Tiger Skin Curse (Su): Once per month, a vampire-spectre may make a ranged touch attack (10 ft range, no range increments) with a tiger skin. If the skin hits, the victim must make a DC X Fort save, or absorb the skin and immediately transform into a weretiger. The victim must also make a DC X Will save or fall under the command of the vampire-spectre as through the vampire-spectre's dominate ability.
Each day, the victim must make an additional Will save. If it fails, it becomes permanently dominated by the vampire-spectre; if it succeeds, it resists mental control but may be dominated by the vampire-spectre just like any other creature. After a failed save, the weretiger victim must still make a DC X Will save each day until it fails again. On the first failure, the weretiger's alignment permanently shifts to chaotic evil.
At any point, a vampire-spectre may command only X weretigers but may remove the tiger skin, lycanthropy, and mental domination from a victim as a full-round action, although alignment changes remain. Otherwise, the curse, including any alignment shift, may be removed only by the wish and miracle spells or a break enchantment spell if the caster succeeds at a DC X caster level check. After the destruction of the vampire-spectre, the victim becomes a free-willed weretiger.
