The 2.18 hboot comes with the latest at&t 5.18 update. Did you not search before creating this thread?

Sent from my MID-1040
HTC Evita | KarbonKat 4.4.2 1.0-5
S-off | 2.14 | Modified TWRP 2.6.3
Do not PM me asking for assistance, that's what my Q&A thread is for!