Tutorial on how to change your blogger template using new template format in xml. I will explain it in three simple steps.
1. Grab your new template, remebre that new blogger template is using xml format, so make sure new template you've got has xml ekstension in it. Save it in your harddisk.
2. Go to Blogger control panel and click Edit HTML.
3. At Edit HTML section you can upload your new template.

Click browse then locate your xml template in hardisk, then simply click upload.
All steps are done. Now you finished installing new blogger template. To test it just click View Blog at top of page.