[Q] Boot from custom recovery

[n1234d]

I want to know if its possible to fastboot boot customrecovery.img.
What I want to do:
I have the m7_u, completely stock. I love the DSP Manager effects, so I want to install it, but for it to work properly, you need to flash it via a recovery. You also need to be rooted. But, if I flash a custom recovery, I'll get ***TAMPERED*** on my bootloader screen, which I don't want :crying: So, is it possible to do this:
1. Unlock bootloader via HTCDev
2. fastboot boot twrp.img
3. Flash root zip in recovery
4. Flash DSP manager zip in recovery
5. Reboot and no tampered message on bootloader, rooted and with DSP manager installed.

I have HBOOT 1.54, so no s-off for me :crying: .. That would have solved all of this

 

[EddyOS]

Can't be done on the new HBOOT, even if S-OFF - HTC stopped that

 

[n1234d]

So what would be the best way for me to go ahead? Any ideas? I'd just be happy if I could do all of this any other way without getting the tampered message..

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