I'm a beginner with Javascript development and extjs4. I'm looking for some ***** level instructions on how to get extjs4 working with one of the recommended IDE's.

I've tried following the instructions at...
http://www.sencha.com/forum/showthre...rt-for-Ext-JS4

only to find that at step 8 there is no 'ext.jsb' file in the evaluation download. Any ideas?