Calling all experts,

I would like to know if it's easy to replace a broken exterior/interior glass block on my house? How do I do this? I have the spacers.. but is there an area that I have to be especially careful with when taking out the old broken glass and replacing with an new glass block? The broken glass block is in the bottom left row of a glass block window that has many glass blocks. (4 blocks across and 20 blocks high). Thanks for your help!

David