I've just found this free program that lets you spell check anything within Windows... It's able to spell check songs in EasyWorship too.

http://hcidesign.com/freespell/

It's a little clumsy/basic, but seems to work OK for me... There is a 'pro' version that you can purchase which has a nicer interface, but does the same job.

You Edit a song, highlight the text, press the 'hot key' eg WinKey and Z. and it pops up suggesting words for the typos. - if there are no spelling mistakes then nothing happens!