[nightcracker]

Simple.

Add this to the .toc file:

##SavedVariables: FerousMinimapScale

And this to the top of the .lua file:

local addon = ...

SLASH_MYSCRIPT1 = "/scale";
SlashCmdList["MYSCRIPT"] = function(cmd)
	if not tonumber(cmd) then return end
	Minimap:SetScale(tonumber(cmd))
	FerousMinimapScale = tonumber(cmd)
end

local holder = CreateFrame("Frame")
holder:RegisterEvent("ADDON_LOADED")
holder:SetScript("OnEvent", function(self, arg1)
	if arg1~=addon then return end
	FerousMinimapScale = FerousMinimapScale or Minimap:GetScale()
	Minimap:SetResizable(true)
	Minimap:SetScale(FerousMinimapScale)
end)