Polite question to theme bizpress

Hi,

ever since I've switched to this theme error messages in my Webmaster Tools.

Error: Missing required field "entry-title".
Error: Missing required field "updated".
Error: Missing required hCard "author".


I have found this online solution:
http://www.ilmigo.com/fix-hfeed-warning-field-set-hatomentry.html

only this is not suitable for this theme. So my question please, in which file I can make this change?

thank you for feedback

These customizations can be made in the file theloop.php.

I have no idea how do I do that ;-), but now I know where ever, thank you for the feedback