i dont know if this is a repost or not, but if it is a repost, sorry! this wil be a reminder then!
woops exedently clicked post, anywyas,
1. go to Wowhead: It's like successfully soloing a raid boss, only for databases.
2. Find you weapon name that you want the displayid off, ill use decapitator Decapitator - Wowhead Search
3. Click on the item and you come up on this screen : The Decapitator - Items - World of Warcraft
4. now go to the url and type behind the item id &xml
5. It should show up at your url : http://www.wowhead.com/?item=28767&xml
6. http://www.wowhead.com/?item=28767&xml All infor about your item
Including the DIsplayid wich is " <icon displayId="40066">INV_Axe_66</icon> "Code:<wowhead> − <item id="28767"> <name>The Decapitator</name> <level>125</level> <quality id="4">Epic</quality> <class id="2">Weapons</class> <subclass id="0">One-Handed Axes</subclass> <icon displayId="40066">INV_Axe_66</icon> <inventorySlot id="13">One-Hand</inventorySlot> − <htmlTooltip> <table><tr><td><b class="q4">The Decapitator</b><br />Binds when picked up<table width="100%"><tr><td>One-Hand</td><th>Axe</th></tr></table><table width="100%"><tr><td>167 - 312 Damage</td><th>Speed 2.60</th></tr></table>(92.1 damage per second)<!--e--><br />Durability 105 / 105<br />Requires Level 70</td></tr></table><table><tr><td><span class="q2">Equip: Improves critical strike rating by 27 <small>(1.22% @ L70)</small>.</span><br /><span class="q2">Use: Hurls your axe in an attempt to decapitate your target causing 513 to 567 damage. (3 Min Cooldown)</span></td></tr></table> </htmlTooltip> <link>http://www.wowhead.com/?item=28767</link> </item> </wowhead>
*around EDIT 10 now lol* : Wrong section, belongs to the guides, sorry for that