Rooting the HTC Hero/G2..(success)
If you have a 2.73+ rom with the latest hboot you will need to follow This Post to boot the recovery image
1) restart into bootloader (switch on holding the back button)
2) Extract the latest GSM Hero recovery IMG
into your android SDK/tools folder
(For SDK & CMD help reffer to Post 3 "The Basics"
3) Download Superuser.zip
and extract the contents to your SDK/tools folder.
4) Plug in USB
5) open a CMD prompt from the tools directory and type the following command> fastboot boot recovery-RA-hero-v1.5.2.img
(you should now enter a recovery console on the handset)
NOW PERFORM A NANDROID BACKUP
from the recovery menu, once completre, continue..
6)then type the following commands in CMD exactly as they are here, hitting enter for a new line.
adb shell mount /system
adb push su /system/bin/
adb shell chmod 4755 /system/bin/su
adb push Superuser.apk /system/app/
adb shell reboot
Congratulations you now have root access..
Download "Root Boot" from the app store (this will only work if you have root!)
Step 6 modified thanks to ENLIGHTENER, cheers, su whitelist working nicely now..
Recovery image updated to recovery-RA-hero-v1.5.2.img , thanks to Amon_RA
Please be carefull! I accept no liability!
FYI, To unroot you will have to either restore an earlier backup or flash a stock rom..... (reccomend the new official HTC Update via RUU to do a full reset)