not done one in a while, but it was a total head ache! followed this guide here but the guy seems to make it sound like a 5min job... Good Luck

glennburks.com/moving-from-drupal-6-x-to-wordpress-3/

I did one a few months back, there are a few different options out there and quite a few tutorials but I couldn't find one that would import everything and get it all setup right.
I ended up writing my own script to do this, I think in the long run it would be much better to do this way. Saves a lot of headaches and troubles trying to use something somebody else wrote that may or may not work.

better you should hire an expert to do that