How to Fix spell check in OS in XP

Does anyone know how to put a spell checker into outlook express 6.0 on XP system. OS isn't compatable with XP in spell check. I tried downloading different spell check programs but had problems with them. Plus, I didn't want to pay for one either. So, tried a couple free ones. I also tried the i86? file to expand and it couldn't find the file. Any suggestions greatly appreciated. Juls

http://www.mozilla.com/en-US/thunderbird/

Thanks. I download mozilla and then imported my address book. Only I have 2 accounts and mozilla went to the master and my is a sub account. I don't use the master anymore because it was for a different person. So, how do I download to my account? Also, I use outlook through time warner road runner. Do I have to change my pop-server for send/receive in order to get my mail? Also, Do I need to save my files in os or will they import with the address book? Thanks for your help. Juls