Macx,
Very interesting solution! I too am with lattesurf and to my knowledge, wasn't possible on majority of firmware versions and was only a real feature a lot later on...... So I would have also agree with lattesurf that if you didn't have that feature, then you wouldn't have been able to do it.
So, can you tell me what you did exactly? You just repartition it (through Windows? Created two drives or something?) then reformatted it again (from Windows?).
I would be interested to know how you did it and see if others can do the same to get the same feature.
For the sleep timer, look at this Knowledge Base and see if it help solve your problem:
How to: Set sleep and power off settings.