xml -> lua. The credits are now very easy to modify, just add a time in the correct section.

stepmania/Themes/default/BGAnimations/ScreenCredits overlay/credits.lua

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+-- I'm not comfortable including assets or code from people who want to keep their
+-- name a secret. If they believe their contribution places them at any kind of
+-- risk, then we should be just as wary. Also, it often makes it hard to track
+-- people down a year or more later if necessary.
+
+local graphics = {
+	"Lucas “v1ral” Tang",
+	"SPiGuMuS",
+	"Visage",
+	"Ryan “Plaguefox” McKanna",
+	"Lamden “Cloud34” Travis",
+	"Michael “Redcrusher” Curry",
+	"Steve “healing_vision” Klise",
+	"Mauro Panichella",
+	"Popnko",
+	"Griever (Julian)",
+	"Miguel Moore",
+	"Dj “AeON ExOdus” Washington",
+	"Xelf",
+	"James “SPDS” Sanders",
+	"k0ldx",
+}
+
+local theme = {
+	"AJ “AJ 187” Kelly",
+	"Dan “dieKatze88” Colardeau",
+	"Mike “mDaWg” Calfin",
+}
+
+local web = {
+	"Brian “Bork” Bugh",
+}
+
+local sound = {
+	"Kyle “KeeL” Ward",
+	"Jim “Izlude” Cabeen",
+	"Sanxion7",
+}
+
+local programming = {
+	"Chris Danford",
+	"Frieza",
+	"Glenn Maynard",
+	"Bruno Figueiredo",
+	"Peter “Dro Kulix” May",
+	"Jared “nmspaz” Roberts",
+	"Brendan “binarys” Walker",
+	"Lance “Neovanglist” Gilbert",
+	"Michel Donais",
+	"Ben “Mantis” Nordstrom",
+	"Chris “Parasyte” Gomez",
+	"Michael “dirkthedaring” Patterson",
+	"Sauleil “angedelamort” Lamarre",
+	"Edwin Evans",
+	"Brian “Bork” Bugh",
+	"Joel “Elvis314” Maher",
+	"Garth “Kefabi” Smith",
+	"Pkillah",
+	"Robert Kemmetmueller",
+	"Ben “Shabach” Andersen",
+	"Will “SlinkyWizard” Valladao",
+	"TheChip",
+	"David “WarriorBob” H",
+	"Mike Waltson",
+	"Kevin “Miryokuteki” Slaughter",
+	"Thad “Coderjoe” Ward",
+	"Steve Checkoway",
+	"Sean Burke",
+	"XPort",
+	"Charles Lohr",
+	"Josh “Axlecrusher” Allen",
+	"Jason “Wolfman2000” Felds",
+}
+
+local thanks = {
+	"SimWolf",
+	"DJ DraftHorse",
+	"Dance With Intensity",
+	"BeMaNiRuler",
+	"DDRLlama",
+	"DDRManiaX",
+	"NMR",
+	"DJ Paranoia",
+	"DJ Yuz",
+	"Reo",
+	"Random Hajile",
+	"Chocobo Ghost",
+	"Tyma",
+	"Deluxe",
+	"Lagged",
+	"The Melting Pot",
+	"DDRJamz Global BBS",
+	"Eric “WaffleKing” Webster",
+	"Gotetsu",
+	"Mark “Foobly” Verrey",
+	"Mandarin Blue",
+	"Kenny “AngelTK” Lai",
+	"curewater",
+	"Bill “DMAshura” Shillito",
+	"Illusionz - Issaquah, WA",
+	"Quarters - Kirkland, WA",
+	"Pier Amusements - Bournemouth, UK",
+	"Westcliff Amusements - Bournemouth, UK",
+}
+
+local sections = {
+	{ "☆☆GRAPHICS☆☆", graphics },
+	{ "☆☆THEME CODE☆☆", theme },
+	{ "☆☆WEB DESIGN☆☆", web },
+	{ "☆☆SOUND☆☆", sound },
+	{ "☆☆PROGRAMMING☆☆", programming },
+	{ "☆☆SPECIAL THANKS TO☆☆", thanks },
+}
+
+-- To add people or sections modify the above.
+
+local fontPath = THEME:GetPathF( "ScreenCredits", "titles" )
+local lineOn = cmd(zoom,0.5)
+local sectionOn = cmd(zoom,0.5;diffuse,1,.5,.5,1)
+local otherOn = cmd(zoom,0.5;diffuse,.5,.5,1,1)
+local children = {}
+
+local function AddLine( text, command )
+	local t = Def.BitmapText {
+		_Level = 2;
+		File = fontPath;
+		Text = text or "";
+		OnCommand = command or lineOn;
+	}
+	-- XXX: Hack. Wrap in an ActorFrame so OnCommand works
+	table.insert( children, WrapInActorFrame({t}) )
+end
+
+-- Add header and padding
+AddLine( "STEPMANIA TEAM", otherOn )
+AddLine()
+AddLine()
+AddLine()
+
+-- Add sections with padding.
+for section in ivalues(sections) do
+	Trace( "steve: " .. section[1] )
+	AddLine( section[1], sectionOn )
+	for name in ivalues(section[2]) do
+		AddLine( name )
+	end
+	AddLine()
+	AddLine()
+	AddLine()
+end
+
+-- Add more padding and then the join the team.
+for i=1,13 do AddLine() end
+
+AddLine( "Join the StepMania team", otherOn )
+AddLine( "and help us out!" )
+
+-- Wrap everything up in an ActorScroller
+return Def.ActorScroller {
+	SecondsPerItem = 0.40;
+	NumItemsToDraw = 40;
+	TransformFunction = function( self, offset, itemIndex, numItems)
+		self:y(30*offset)
+	end;
+	OnCommand = cmd(zoom,0.64;scrollwithpadding,12,0);
+	children = children;
+}

stepmania/Themes/default/BGAnimations/ScreenCredits overlay/default.lua

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+local children = {
+	LoadActor( "song background scroller" ) .. {
+		InitCommand = cmd(x,SCREEN_CENTER_X-160;y,SCREEN_CENTER_Y);
+	};
+	LoadActor( "credits" ) .. {
+		InitCommand = cmd(x,SCREEN_CENTER_X+160;y,SCREEN_CENTER_Y);
+	};
+--	Def.Quad {
+--		InitCommand = cmd(diffuse,0,0,0,0;setsize,SCREEN_WIDTH,60;x,SCREEN_CENTER_X;y,SCREEN_TOP+30;diffusebottomedge,0,0,0,0);
+--	};
+--	Def.Quad {
+--		InitCommand = cmd(diffuse,0,0,0,0;setsize,SCREEN_WIDTH,60;x,SCREEN_CENTER_X;y,SCREEN_BOTTOM-30;diffusetopedge,0,0,0,0);
+--	}
+}
+
+return WrapInActorFrame( children )

stepmania/Themes/default/BGAnimations/ScreenCredits overlay/song background scroller.lua

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+local template = Def.ActorFrame {
+	children = {
+		Def.Sprite {
+			OnCommand = cmd(LoadBackground,GetRandomSongBackground();scaletoclipped,312,232);
+		};
+		LoadActor( THEME:GetPathG("ScreenCredits", "background frame") );
+	};
+}
+local children = {}
+
+for i=1,10 do
+	table.insert( children, template )
+end
+
+return Def.ActorScroller {
+	SecondsPerItem = 4.25;
+	NumItemsToDraw = 4;
+	TransformFunction = function( self, offset, itemIndex, numItems )
+		self:y(-240*offset)
+	end;
+	OnCommand = cmd(scrollwithpadding,2,3);
+	children = children;
+}