OK, vorgekaut...
CREATE TABLE `sieq1_assets` (
`id` int(10) UNSIGNED NOT NULL COMMENT 'Primary Key',
`parent_id` int(11) NOT NULL DEFAULT '0' COMMENT 'Nested set parent.',
`lft` int(11) NOT NULL DEFAULT '0' COMMENT 'Nested set lft.',
`rgt` int(11) NOT NULL DEFAULT '0' COMMENT 'Nested set rgt.'...