Dividing by 10 worked for some locs I tried, it doesn't seem exactly right, but should be within about 10 of the correct Z
On another note, Ariak your bad spawn in sleepers is
Code:
INSERT INTO spawn2 VALUES (10323,20317,'sleeper',478,65,0,180,400,1);
Should be
Code:
INSERT INTO spawn2 VALUES (10323,20317,'sleeper',478,-65,0,180,400,1);