I completed the quest involved with it, but its still there. I need the I.D. so I can remove it manually or some other way to remove it. How would I remove it manually with the console commands? "player.removeitem baseid"?

For some quests there are multiple items you can use to finish the quest, because you have the agent, I'm assuming you used the little rockets instead? All quest items unless directly used, stay in your inventory.

You don't need to worry about removing it, because it doesn't have any weight to it.

I still need to figure out a way to remove it because I guess the item weight mod I installed changed its weight to 0.85.

Use FNV edit to remove the "Quest item" flag from that entry, or geez GECK.

If on the PC use the console and use player.deleteitem xxx xx. The first xxx is the item id, found herehttp://faqs.ign.com/articles/113/1130669p1.html or here http://fallout.wikia.com/wiki/Fallout:_New_Vegas_miscellaneous_items. The last xx is for the number, which in your case is 1.

How would I do that using one of those tools. I don't use them.