Baldur's Gate 2

First: You need to enter Debug Mode=1 under Program Options in the baldur.ini file in your Baldur's Gate directory and then save.
Second: Import the .tbg with the Infinity Addon Patcher after unzipping the .zip file.
Third: Start Baldur's Gate 2 and press CTRL+Space while in the game.
Fourth: Type one of the following exactly as I have it, without the name of the item.

Weapoms

CLUAConsole:CreateItem("ArroGM01") - Arrows of Artemis
CLUAConsole:CreateItem("ArroGM02") - Apollo's Arrows
CLUAConsole:CreateItem("ArroGM03") - Cupid's Love Arrows
CLUAConsole:CreateItem("ArroGM04") - Ice and Acid Arrows
CLUAConsole:CreateItem("BlasBlad") - Blast Blade
CLUAConsole:CreateItem("BowGM01") - Bow of Artemis
CLUAConsole:CreateItem("BowGM02") - Apollo's Bow
CLUAConsole:CreateItem("BowGM03") - Cupid's Bow
CLUAConsole:CreateItem("BowGM04") - Forest Bow
CLUAConsole:CreateItem("Calandor") - Callandor
CLUAConsole:CreateItem("ClubGM01") - Club of Hercules
CLUAConsole:CreateItem("DaggGM01") - Dagger of Artemis
CLUAConsole:CreateItem("HammGM01") - Athena's Warhammer
CLUAConsole:CreateItem("KataGM01") - Ice Katana of Poseidon
CLUAConsole:CreateItem("KataGM02") - Fire Katana of Prometheus
CLUAConsole:CreateItem("SperGM01") - Poseidon's Trident
CLUAConsole:CreateItem("SperGM02") - Nike's Spear
CLUAConsole:CreateItem("StafGM01") - Staff of Hermes
CLUAConsole:CreateItem("StafGM02") - Druid's Staff
CLUAConsole:CreateItem("StafGM03") - Staff of Light or Dark
CLUAConsole:CreateItem("SworGM01") - Sword of Ares
CLUAConsole:CreateItem("SworGM02") - Sword of Truth
CLUAConsole:CreateItem("SworGM03") - Long Sword+3
CLUAConsole:CreateItem("SworGM04") - Sword of Life and Death
CLUAConsole:CreateItem("SworGM05") - Short Sword of the Mage
CLUAConsole:CreateItem("SworGM06") - Paladin Slaying Sword
CLUAConsole:CreateItem("SworGM07") - Burn
CLUAConsole:CreateItem("SworGM08") - Bite
CLUAConsole:CreateItem("SworGM10") - Daylight
CLUAConsole:CreateItem("SworGM11") - Midnight
CLUAConsole:CreateItem("SworGM12") - Undead Scimitar
CLUAConsole:CreateItem("SworGM13") - The Miner
CLUAConsole:CreateItem("SworGM14") - Sihn's Soulreaver
CLUAConsole:CreateItem("SworGM15") - Severium
CLUAConsole:CreateItem("WhirlGM") - Whirlwind

Armor

CLUAConsole:CreateItem("ArmoGM01") - Armor of Zeus
CLUAConsole:CreateItem("ArmoGM02") - Mithrall Field Plate Armor+4
CLUAConsole:CreateItem("ArmoGM03") - Full Plate+5
CLUAConsole:CreateItem("ArmoGM04") - Robe of the Shou'el Fanar
CLUAConsole:CreateItem("ArmoGM05") - Flame Mail
CLUAConsole:CreateItem("BeltGM01") - Aphrodite's Belt
CLUAConsole:CreateItem("BootGM01") - Boots of Hermes
CLUAConsole:CreateItem("BootGM02") - Dark Boots
CLUAConsole:CreateItem("GaunGM01") - Gauntlets of Ares
CLUAConsole:CreateItem("HelmGM01") - Hade's Helm
CLUAConsole:CreateItem("HelmGM02") - Helm of Mind Protection
CLUAConsole:CreateItem("HelmGM03") - Wizard's Hat
CLUAConsole:CreateItem("ShieGM01") - Shield of Achilles
CLUAConsole:CreateItem("ShieGM02") - Shield of Spell Deflection

Misc.

CLUAConsole:CreateItem("AmulGM01") - Dark Amulet
CLUAConsole:CreateItem("RingGM01") - Narya
CLUAConsole:CreateItem("RingGM02") - Dark Ring

Spells

CLUAConsole:LearnSpell("Balefire") - Balefire
CLUAConsole:LearnSpell("DanceGM") - Dance With the Dead
CLUAConsole:LearnSpell("DSkinBlk") - Skin of the Black Dragon
CLUAConsole:LearnSpell("DSkinRed") - Skin of the Red Dragon
CLUAConsole:LearnSpell("DSkinSil") - Skin of the Silver Dragon
CLUAConsole:LearnSpell("SArmoGM") - Shadow Armor
CLUAConsole:LearnSpell("SBladGM") - Shadow Blade
CLUAConsole:LearnSpell("SBoltGM") - Shadow Bolt
CLUAConsole:LearnSpell("SoulStel") - Soul Stealer
CLUAConsole:LearnSpell("WhirlGM") - Whirlwind Attack