Photoshop help

Hi guys,
The following image is obviously a guage dial I am doing for a friend of mine.
I am using PhotoshopCS, but need to do 2 things to the colour which I am experiencing great difficulty with. To be be bloody honest, I have virtually no idea how to correct it and in fact, don't have a lot of experience with Photoshop, but am percevering.
1, I need the image more olive in colour and 2, it needs to have a slite silver effect.
If anyone can advise, I would sincerely appreciate it.
Nige

The following image is obviously a guage dial I am doing for a friend of mine.
I am using PhotoshopCS, but need to do 2 things to the colour which I am experiencing great difficulty with. To be be bloody honest, I have virtually no idea how to correct it and in fact, don't have a lot of experience with Photoshop, but am percevering.
1, I need the image more olive in colour and 2, it needs to have a slite silver effect.
If anyone can advise, I would sincerely appreciate it.
Nige
