I have some logo's im using to make some promotional material. The JPEG's all come with a white background.

What i want to do is tweak them so that the background is transparent and i can save them as a GIF so that i can use them on any colour background in the future.

Anyone know how in photoshop i can make the white background transparent??

Ive tried saving it as a GIF but it doesnt work as the image is all one layer so i need to try another technique to do it.

Any ideas??