Default [Q] Tate-PVT-08 safe to install 2nd bootloader?

I have read quite some threads now but I'm still unsure if my KFHD is safe to install a 2nd bootloader or not.

Code:
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C:\Users\Monk>fastboot -i 0x1949 getvar product
product: Tate-PVT-08
finished. total time: 0.000s
Software version of the device reads: 7.4.1_user_4108620

Is it safe to install it via http://forum.xda-developers.com/show....php?t=2128848 and if yes do I need to downgrade to 7.2.3 first?