I have attempted a multistore - and have a post
http://forum.abantecart.com/index.php/topic,1244.msg4876.html#msg4876that is awaiting enough guidance to have a success with multistore.
Since adding a mutistore I am now getting warning on every Product I add. I don't know if these warnings are due to the unsuccesful multistore attempt- or there is another issue.
I have not deleted the additional store while awaiting a reply for getting it setup correctly.
Here's what's in the logs:
2013-10-24 19:20:57 - warning: AbanteCart core v.1.1.7 array_unique() expects parameter 1 to be array, null given in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>118</b>
2013-10-24 19:20:57 - warning: AbanteCart core v.1.1.7 Invalid argument supplied for foreach() in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>119</b>
2013-10-26 18:40:18 - warning: AbanteCart core v.1.1.7 explode() expects parameter 2 to be string, array given in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>113</b>
2013-10-26 18:40:18 - warning: AbanteCart core v.1.1.7 Invalid argument supplied for foreach() in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>114</b>
2013-10-26 18:40:18 - warning: AbanteCart core v.1.1.7 array_unique() expects parameter 1 to be array, null given in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>118</b>
2013-10-26 18:40:18 - warning: AbanteCart core v.1.1.7 Invalid argument supplied for foreach() in <b>/home/mmonline/public_html/shop/admin/model/catalog/product.php</b> on line <b>119</b>