Just startd with oracle 9i and I cant figure out how to properly query the tree from following table with zort ordering

PHP Code:
ID | SUBID | TREEE | LEVEL | ZORT | NAME
---------------------------------------------------------------
1  | 0     |/      | 1     | 1    | first node
---------------------------------------------------------------
2  | 1     |/1/    | 2     | 2    | first subnode
---------------------------------------------------------------
3  | 2     |/1/2/  | 3     | 3    | first subsubnode
---------------------------------------------------------------
4  | 2     |/1/2/  | 3     | 4    | second subsubnode
--------------------------------------------------------------- 
The tree column holds the paths for tree nodes so i can query the tree with one simple query but i don't know how to query tree by using zort for ordering the tree nodes

Select * from thistable order by concat(tree,to_char(id))

first node
|-first subnode
|--second subsubnode (zort = 4)
|--first subsubnode (zort = 3)

can anybody help me figure this out?