Can I update my M7?

Hi,

I'm a bit confused regarding Custom ROM's and Firmware....
A while ago I rooted my phone and installed ViperOne 7.0.1, but on their website to upgrade to ViperOne 9 it says "The 9.x.x rom is based on HTC latest 5.0.2 base and requires you to update your firmware to 5.0.2 version!".

I'm a bit confused, what is the firmware version?
On my phone for Software number (which I believe is the same as firmware version????) it says "ViperOne 7.0.1"

My phone is S-ON and HBOOT 1.57 so if I need S-OFF I will have to apparently use Sunshine, do I need S-OFF?

Here are the details I have found for my phone

M7-UL PVT SHIP S-ON RH
HBOOT-1.57.0000
RADIO-4A.27.3263.27
OpenDSP-v32.120.274.0909
OS-
eMMC-boot 2048MB
Jul 17 2014,17:35:22.0

D:\Downloads\minisdk>fastboot getvar all
< waiting for device >
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.57.0000
(bootloader) version-baseband: 4A.27.3263.27
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0710000
(bootloader) cidnum: ORANG001
(bootloader) battery-status: good
(bootloader) battery-voltage: 4050mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-660ef031
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!


Thanks