what exacly "it" says? see on the structure of database! I allays export it via MySQL database nor XOOPS backup. Than before import to new one I delete some lines on the begoinign (that says about database name etc).
1. xoops_trust_path is regular folder used in XOOPS sites. Compare with protector and alsys instalation. 2. You have to download all in one package. Xigg works on Sabai framework - included in this package. form me works fine: http://www.izba.zgora.pl