There no need any extra confirmation. N-Gage (NEM-4) and QD (RH-29 / RH-47) just normal WD2 platform S60 Nokia smartphones.
And can be flashed only with original service FW DPs, 'cause after flashing process, already loaded FW binds to the HW/IMEI of unit where it loaded.
So, in case of original S40/S60 Nokia smart/phones, no any kind of FW dumps could be used to revive dead/blank (Lite SWAP) units.
That's why any alive Nokia Prototypes, especially builds of unreleased models cost so high - 'cause each unit is unique.
So, one more time, if to be short, dumps can't be used for fresh-reflashing, and even can't be used if U'll wipe-out FW of your own units.
Only plus of that data - just for possible (EKA2L1) emulation. But even here no any great profit, 'cause in EKA2L1 already using QD DEV Kit FW dump, and as I remember your units are loaded with just Pre-Retail FW (same as few my early PROTOTYPE Classic on various HWiD stages), not Dev FW with extra DeBug / TEST pre-installed apps like in GD devices.
So that's a +- close to zero affect for emulation / possible restoration already, whether U'll post that dumps or not.
P.S. Also, lower your expectations BobTop, no one remember to DerSammler previously shared anything related to N-Gage SW/Media, even from useless data. So 99.(9)% sure, even my words or words of another Symbian specialist will be valuable not enough to calm his "anxiety", ha-ha.