Here, I am covering step by step guide to root HTC wildfire 2.2.1 and install Android 2.3 on HTC Wildfire.
Anyways, here is how you can root HTC wildfire 2.2.1 and get htc wildfire Android 2.3
What you need to update your android 2.2 to 2.3 ?
HTC wildfire with S-OFF , HBOOT 1.01.0002 , OS Froyo 2.2.1
USB Drivers (Download)
RUU Rom 2.1 / RUU_Buzz_HTC_WWE_1.14.405.2_R_Radio_188.8.131.52_3. 35.15.31_release_130814_signed (Download)
Unrevoked 3.2 Test version (Download)
Cyanogenmod 7 (Download) and Google Apps (Download)
Time and Patience & last but not the least,
Balls of Steel