Just for kicks, I went into PCGen this morning and loaded up the PHB, the DMG, and Dragon Lords of Melnibone (which I admittedly don't actually own a copy of), and created what I think is a fairly accurate representation fo Elric in D20 terms... comments welcome.
(Please bear with me if this doesn't work, I'm copy/pasting... if it looks bad I'll come back and fix it)
Elric, Male
Melnibonean
Hit Dice: (10d4)+(10d10)
Hit Points: 59
Initiative: +3
Speed: Walk 30'
AC: 13
Attacks: Stormbringer+22/+17/+12; Melnibonean Bone Bow+19/+14/+9;
Damage: Stormbringer1d10+7; Melnibonean Bone Bow1d8+1;
Face\Reach: 5 ft. by 5 ft.\5
Special Qualities: save +2 vs enchantment spells,+2 on Alchemy,+2 on Intimidate,+2 on Knowledge (Arcana),+2 on Knowledge (Million Spheres),+2 on Spellcraft,Summon Familiar
Saves: Fortitude: +10, Reflex: +9, Will: +11
Abilities: Str 15 (+2), Dex 16 (+3), Con 10 (+0), Int 16 (+3), Wis 12 (+1), Cha 18 (+4)
Skills: Alchemy 15; Concentration 23; Ride 26; Scent/Taste 23; Spellcraft 28;
Feats: Armor Proficiency (Heavy) (1x),Armor Proficiency (Light) (1x),Armor Proficiency (Medium) (1x),Blind-Fight,Cleave,Close-Order Fighting,Dodge,Exotic Weapon Proficiency,Great Cleave,Improved Bull Rush,Improved Critical (Sword (Bastard/2-H)),Martial Weapon Proficiency,Mounted Combat,Power Attack,Quick Draw,Set Spear,Shield Proficiency,Simple Weapon Proficiency,Sunder
Challenge Rating: 20
Alignment: Chaotic Neutral
Possessions: Outfit (Royal); Stormbringer; Melnibonean Plate

(Please bear with me if this doesn't work, I'm copy/pasting... if it looks bad I'll come back and fix it)
Elric, Male
Melnibonean
Hit Dice: (10d4)+(10d10)
Hit Points: 59
Initiative: +3
Speed: Walk 30'
AC: 13
Attacks: Stormbringer+22/+17/+12; Melnibonean Bone Bow+19/+14/+9;
Damage: Stormbringer1d10+7; Melnibonean Bone Bow1d8+1;
Face\Reach: 5 ft. by 5 ft.\5
Special Qualities: save +2 vs enchantment spells,+2 on Alchemy,+2 on Intimidate,+2 on Knowledge (Arcana),+2 on Knowledge (Million Spheres),+2 on Spellcraft,Summon Familiar
Saves: Fortitude: +10, Reflex: +9, Will: +11
Abilities: Str 15 (+2), Dex 16 (+3), Con 10 (+0), Int 16 (+3), Wis 12 (+1), Cha 18 (+4)
Skills: Alchemy 15; Concentration 23; Ride 26; Scent/Taste 23; Spellcraft 28;
Feats: Armor Proficiency (Heavy) (1x),Armor Proficiency (Light) (1x),Armor Proficiency (Medium) (1x),Blind-Fight,Cleave,Close-Order Fighting,Dodge,Exotic Weapon Proficiency,Great Cleave,Improved Bull Rush,Improved Critical (Sword (Bastard/2-H)),Martial Weapon Proficiency,Mounted Combat,Power Attack,Quick Draw,Set Spear,Shield Proficiency,Simple Weapon Proficiency,Sunder
Challenge Rating: 20
Alignment: Chaotic Neutral
Possessions: Outfit (Royal); Stormbringer; Melnibonean Plate