Thanks for clearing up the 4v5 thing! Now i'll know it!
As for the other info, it all sounds good! I'll look up the data spec sheet on the regulator to see the most voltage I can put through it!
Thanks and i'll make sure not to use the 6v battery, since it sounded like you did not think it would be a good idea. I'll see maybe i'll put two of those in (in series), so it bumps it to 12v which the regulator will not struggle with, unless it pumps too many amps in for the regulator. I'd rather major overkill (safely) and get like 5 hours of strong battery life than have to take apart my rig and change batteries every 20 mins.
Thanks all!