Need assistance Redirecting a Wordpress Blog via htaccess

I am completely lost on this area. I will try to give as much detail as I can to cut down on the number of questions

I have a self hosted installed wordpress blog located at
http://www.grocerypricebooks.com/grocerypriceblog/ I want to move JUST THE BLOG (/grocerypriceblog section) to http://DelightfulChaos.com. I do not want to move the GPB DOMAIN just the blog portion.

I was told to place certain codes in my htaccess folder but everyone I have tried doesn't work. It would either do nothing, redirect every link to just the home page of the new log or come up as broken links.

What I want is for ALL links to redirect to the same link on the new domain.

EXAMPLE

When this is clicked
http://www.grocerypricebooks.com/grocerypriceblog/twitter/big-manufacturers-on-twitter

I want it to redirect to
http://www.delightfulchaos.com/twitter/big-manufacturers-on-twitter

If you can help please let me know. Wat I need is WHERE do I put the .htaccess file, what specifically should be in it etc. Please talk to me as if I am 2 with no coding knowledge because no one else has been able to help.

Thank you so much!