Redmine

Hi,
for a few hours now I tried to import my mantis project.
I've tried a lot of modified .rakes, also trying to modify them myself but nothing worked. All different versions and fixes I found fixed something so got to the next error.
Or to the previous, then I modified sth. and I skipped one. Now I've messed up both databases, I'm completely puzzled and nearly giving up.

The errors I've got are (from memory): several "time errors" (depending on which fixing level), weak password, missing project_category_table and the latest one: duplicate id

Isn't there anybody who has a working .rake for Mantis 1.2.15 to Redmin 2.3.2?