hi maya,

matt's right that the tabs in the wizard are not ext. i think in general we'd try to avoid having something like a generic tabpanel in our API; however, i did a little looking and it seems that you might be able to use something like GroupTabPanel:

http://examples.ext.net/#/TabPanel/GroupTabPanel/Overview/

There is an Ext4 one that seems to be semi-official (although it's still called 'ux') that I would recommend exploring to see if it works.