DOWNGRADE 2.0.3i to 2.0.2 stable, is possible? HELP

[estaser]

 I've upgraded to 2.0.3I to see if there was any better with 2.0.2 but now there are very important things do not work, as in the cart does not get the total price and shipping even if you set a I said that is empty ... So I want to go back to 2.0.2, as I can do? you've done? I hope your help as these two problems are very serious and I have to deliver and the web. THANKS   
My web: www.pelucashop.com

[quimkaos]

i think so!
But first test if you can. use akeeba backup to backup your site, download your backup file and install on your local server using akeeba kickstart. if you don't have a local web server install one... it's a must to work with joomla, virtuemart or any site software you are setting up.