Uh Oh, Need some help--Won't boot

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http://androidforums.com – So, I was on the Stock ICS OTA from Verizon. I rooted, and got S-Off. Everything was working fine. Installed Titanium, and got everything working fine (enough, apparently) and decided I would do some more tweaking. Restarted into Recovery, did the install, but now, I can't get past the 4G screen of the boot up. No problem, I figured, I made a nandroid when I rooted and s-off. Well, apparently I either did not, or, it is gone. What is the best/only way to get back to the ISC I was running. I just don't want to lose root or S-Off and Superuser so I can restore the Titanium backup (General)