Help with combining photos.

[hayden536]

Hey whats up.

I apologize if this is in the wrong place, but I need some help. I've download some icons off of vector-finder.com and i need to move them onto a background I got off a website. Its a background for a website, and i just need to put the icon on the background. I have no idea how to do this or have applications I have to get. I've attached a picture of the icons and the background. Anyone know how to get it onto there? Thanks a lot.