OK, I've looked at this some more, the U#### drops/groundspawns will use the same lookup as the held weapons/items. So there are actually no code changes to make, just adding the items to the appropriate lookup tables.
So all we need is a list of IDs and items, and we can add them.
It should be noted, however, that ID specifies the graphic the client uses to render the object, not the specific item you pick up. For example, if you drop multiple different items on the ground and they both show up with the "Bag" graphic, then the ID is probably going to be the same. Likewise, the "Red Mushroom" and "Blue Mushroom" IDs/graphics are used for multiple different mushroom items. So ideally we'd pick fairly generic names for IDs that can represent multiple items.
This list is tradeskill items from EQTraders, which I found via TAKproject. I haven't gone through the list to see what we already have IDs for, but this might be a good place to start.
Code:
Misty Acorn - Misty Thicket
Misty Thicket Twig - Misty Thicket
Misty Thicket Fruit - Misty Thicket
Underfoot Mushroom - Kaladim
A Strange Dark Fungus - Kaladim
Oak Bark - Butcherblock Mountains
Permafrost Crystal - Permafrost
Yew Leaves - Wakening Lands
Faydark Twig - Greater Faydark
Evergreen Leaf - Greater Faydark
Sacrosypha Fungus - Lesser Faydark
Morning Dew - Lesser Faydark
Iron Oxide - Steamfont Mountains
Russet Oxide - Steamfont Mountains
Dulfis Mushroom - Paludal Caverns
Black Silt Clay - Hollowshade Moor
Chunk of Porous Ore - Hollowshade Moor
Crystallized Ygri Root - Hollowshade Moor
Grimroot - Hollowshade Moor
Hollow Palm Root - Hollowshade Moor
Blue Capped Mushroom - Shar Vahl
Gray Mud - Shar Vahl
Pinch of Scarlet Moss - Shar Vahl
Redcapped Mushrooms - Shar Vahl
Payala Fruit - Shadeweaver's Thicket
Pile of Stinking Refuse - Shadeweaver's Thicket
Jumjum Stalk - Rivervale
A book of some description - POK
Part of a medallion - Kaesora Library
Part of a medallion - Swamp of No Hope
a crate - City of Mist
Tarnished Coin - all major cities
Ripped Book Page - Innothule Swamp
Innothule Mushrooms - Innothule Swamp
Swamp Vegetables - Innothule Swamp
Silver Ring - Blackburrow
Shield - Docks of Erudin (-600, -725)
Sword - Mines of Kaladim (water edge)
Ribcage - on the ground near the fountain in Mistmore where the Cloaked Dhampyre occasionally chills
Skull - Minotaur Cave (Steamfont) where Meldrath chills
Backbone - Unrest (Pit Area near Dwarf ghost)
Jawbone - Everfrost Ice Cave (+4525, -5238)
Finger - Kedge - Phin's room, on a rock next to the wall (-147, +145, -251)
Deep Soil - The Hole