Accidentally deleted input method

I was using Monolingual and accidentally deleted my input method so now i can't type on the keyboard. I'm running Lion so I don't think there's an easy way to reinstall the input method without a disk. Any suggestions?

Also, I installed Lion on my main partition so because the retail version of Lion is coming out soon, I'm thinking of moving back to 10.6.8 anyway, but I'm running Windows 7 on my other partition. Will reformatting my Mac OS partition and reinstalling SL damage my Windows 7 partition in any way?