Just read
http://talk.maemo.org/showthread.php?t=37808
And then decide if you go with that or with flashing which will not reset the code, but will not ask for the code. I guess the first one is better, because if everything works well you have your device as it was before. And if it doesn't work out you have to flash it anyway ^^.

My password was still the same after flashing - but the first thing after flashing was installing a backup . So maybe the password came with the backup, but I do believe that it was never reset, like described on the flashing page.

PS: To be clear: I always knew and still know my lock code .