Adding Quicktags?

Is there any way I can add a quicktag to the post area. Basicall what I want to do is to add a quicktag so when it is click it automaticall places the code:

a href=”IMAGE URL”><img src=’/blog/wp-content/THUMB’ align=”left” alt=””

This code is to place a thumbnail into the post of an image that I have just uploaded. I also want to make it so that when the thumbnail is clicked the full sized image pops up. I m not very good with PHP so please could someone tell me how to do this, or develop this mod as I think it would be usefull to quite a few people.