Hey, I'm pretty new to Android as well. I bought my Telus Fascinate at the beginning of December. I've rooted it, and started looking into different mods for it, but like you, I'm definitely still learning.
I have Clockwork Recovery through ROM Manager that I downloaded straight from Android Market. What is the difference between flashing it, like you want to, and downloading the market version like I did?
Also, where did you find the Telus stock files? I'm trying to create or find a backup for my Telus Fascinate so I can get on with trying different ROMs with at least a little assurance that I have a 'safety net' in case I muck it up.
Like I said, I'm pretty new to the scene but so far I absolutely love my SGS and the Android community in general!