Data migration from PrestaShop 1.5 to 1.6

PLEASE, DON'T BID WITHOUT READING ALL. 1.- First thing we need is to migrate ARTICLES, CLIENTS AND ORDERS, from 1.5.4 to new shop with 1.6 We need to preserve all details: special offers, categories, pictures... In our first attemp, only 1600 out of 2400 were imported, and not complete success: wrong pictures, wrong stock, wront offers. Clients passwords are wrong, too. We want you to migrate every piece of data from old store to new one. That is the most important part. Second one, is to fix this BUGS in this prestashop 1.6 store. It should be easy: 2.- New prestashop doesn't let enter into preferences/cms page. It shows an error and doesn't allow to access it. 3.- Search engine doesn't behave well: searches like "sprint" or "ps 1" doesn't return correct results. In old version it does 4.- In checkout, disclaimer checkbox is selected by default, but it acts wrong: if you click on it, it deactivate it and allow to go on on checkout 5.- Country selection in checkout and client registration form, in both areas it has to show all European countries. Right now it only shows Spain and Portugal 6.- Footer sometimes shows this error: "Notice: Trying to get property of non-object in /var/www/vhosts/****/httpdocs/modules/posstaticfooter/models/[login to view URL] on line 83" 7.- Module "payment by carrier" doesn't show 3 available options: money transfer (transferencia), TPV (bank payment gateway by redsys) and PayPal. It should. 8.- In checkout before login, when you selects another transport option it shows a tab with an error. Every time you change transport choice, this tab appears. If you login, this doesn't happen. We want to correct this behaviour. 9.- Logged, in Notifications section (alertas de email), upper banner appears twice. Also, "Alertas" button is very different from the rest in the template, we should correct that, too.