Cylinder head, spark plugs

I was replacing the spark plugs on my 88 subaru gl, when i was puttting the new plug in i messed up and cross threaded the threads on the cylinder case. IS there any thing i can do? i have mnever had this problem before. it seems like a big fix?

Subaru boxer engines are a pain to work on as there is limited clearance to the heads. This may help:

http://www.youtube.com/watch?v=Ntiy8L97Nco&feature=related