This track is in serious danger of becoming overused (if it's not already). If you're here downloading this track for your ROMhack, I strongly recommend using any of the myriad other tracks on this site that evoke a similar feeling either instead of or alongside this one. This is a special piece of music, but if every other calm nighttime/forest level in every SMWC ROMhack uses it then it will cease to be special--and that would be a tragedy.
Here are a few excellent tracks with a similar mood that that you could use instead: Tales of Phantasia - Mystic Forest VLDC - Crystarp Hollow (original track by S.N.N.) Mega Man ZX - Wonder Panorama (substantive re-arrangement by Ultima; there's another arrangement by Izuna if this isn't to your tastes) Trials of Mana - Powell Chrono Trigger - Secret of the Forest Undertale - Ruins