Software to Change "Genre" on Multiple tracks...?

[photoshop]

Hi There,

Is there any software out there that i can use to change the Genre (and only the genre) on a bunch of mp3's at once?

Its pain staking to do manually and i have over a 1000 mp3's to do

 

[Clarkey]

this is a simple job in itunes

 

[BruceLee]

mp3tagtools or mp3tag