Will installing cyanogenmod7 on my Samsung Vibrant require me to wipe my phone first?

I'm interested in putting CyanogenMod on my Samsung Vibrant (Galaxy S). The FAQ on Cyanogenmod says: > Q: Do I have to wipe my data before I install CyanogenMod? > > A: Short answer: Maybe. Long answer: Maybe. I understand there's a possibility if something goes wrong that I might have to wipe my phone. However, in the Vibrant instructions right after booting into ClockworkMod Recovery it says to "wipe data/factory reset" and "wipe cache partition". That seems to me to indicate that a factory reset is required, which I would think would wipe out everything on my phone. Is it just that the Vibrant's instruction require a reset or am I not understanding something? Thanks!