Here's how to manually flash a custom recovery. But instead of flashing ClockworkMod, you should flash 4EXT recovery. The steps for flashing are the same. You just flash a different file. In the case of the Incredible 2, 4EXT is the preferred custom recovery.
Once you've got that done, here's a post I wrote about the ideal Incredible 2 setup for use as a daily driver (stable, fully functional, fast, good battery life, and as up to date as possible).
PS- Questions like this belong in the Q&A, help, and troubleshooting forum.
I'm not the 4EXT developer, but here's the .img file for the latest version of 4EXT recovery touch from 4EXT recovery updater. https://www.dropbox.com/s/r4d095djgd040ri/4EXT_Recovery_Touch_v1.0.0.6_RC1.zip The correct MD5 hash is 40d8980bd2274a5171263f4cc8422aa1.
That depends on what you mean by unlock. If you mean the HTC bootloader unlock, there is no need to do that and it would cause problems. S-off is exactly what you want. It's better than the HTC bootloader unlock.
I'm not the 4EXT developer, but here's the .img file for the latest version of 4EXT recovery touch from 4EXT recovery updater. https://www.dropbox.com/s/r4d095djgd040ri/4EXT_Recovery_Touch_v1.0.0.6_RC1.zip The correct MD5 hash is 40d8980bd2274a5171263f4cc8422aa1.
That depends on what you mean by unlock. If you mean the HTC bootloader unlock, there is no need to do that and it would cause problems. S-off is exactly what you want. It's better than the HTC bootloader unlock.