I think you misunderstand. DFHack is the cheat. It's a multipurpose tool that does a variety of other things as well.
To use DFHacks's item creation script, you have to type 'createitem' into the DFHack window, followed by the type of item you want to make and the material it will be made out of.
Though you have to be targeting a creature to use the script. To target yourself in Adventure Mode, just press 'z' in the Dwarf Fortress window.
As an example, you could type in 'createitem WEAPON:ITEM_WEAPON_SWORD_LONG ADAMANTINE' and you would find an adamant long sword sitting at your feet.
Every material, item, creature, plant, etc. has their own specific ID that you must be careful of when using scripts such as this or creating new reactions.
Here's a list of what you will want to type in to get all of your gear.
createitem ARMOR:ITEM_ARMOR_BREASTPLATE ADAMANTINE
createitem ARMOR:ITEM_ARMOR_MAIL_SHIRT ADAMANTINE
createitem HELM:ITEM_HELM_HELM ADAMANTINE
createitem GLOVES:ITEM_GLOVES_GAUNTLETS ADAMANTINE
createitem PANTS:ITEM_PANTS_GREAVES ADAMANTINE
createitem SHOES:ITEM_SHOES_BOOTS ADAMANTINE
If you would prefer reactions, that could be done as well.
[REACTION:ARMOR_CHEAT_ADV]
[NAME:create a suit of armor]
[ADVENTURE_MODE_ENABLED]
[PRODUCT:100:1:ARMOR:ITEM_ARMOR_BREASTPLATE:INORGANIC:ADAMANTINE]
[PRODUCT:100:1:ARMOR:ITEM_ARMOR_MAIL_SHIRT:INORGANIC:ADAMANTINE]
[PRODUCT:100:1:HELM:ITEM_HELM_HELM:INORGANIC:ADAMANTINE]
[PRODUCT:100:1:PANTS:ITEM_PANTS_GREAVES:INORGANIC:ADAMANTINE]
[PRODUCT:100:2:SHOES:ITEM_SHOES_BOOTS:INORGANIC:ADAMANTINE]
[SKILL:FORGE_ARMOR]
This should be copied and pasted at the end of reaction_other.txt. This file can be found in the raw/objects folder within your Dwarf Fortress directory. Then when you next create a new world, your adventurers in that world will be able to create armour out of thin air.
Edit: I forgot to make the reaction give two boots instead of one, and that custom reactions cannot produce gloves properly at the moment. To access the reactions menu as an adventurer, press 'x'. This is the same menu used to butcher corpses for meat and use various magic or innate powers. The only thing adventurers can do by default is knap rocks together to sharpen them.