Exclamation I9000 ROM issue

I rooted my phone with odin 3, then wiped all my data off my phone to get ready for flashing a new one on. I didn't realize that you had to put the custom rom on the INTERNAL sd card, so i put it on my external. Now, in the clockword menu, it won't let me update off the external sd and i'm pretty afraid that my phone is ruined. any tips or help?