well it's hard to help exactly cuz we don't know where it is that you messed up.
when I was attempting to root my phone I had some strange issues... but this was before we knew that the 2.2.1 phones are different then the ones that came with 2.2, but I learned this from it.
when your phone is already 2.2.1 like how it is(broken

), the LG software won't reflash your phone to a proper state, since it is already 2.2.1
you can flash your phone with the 2.2 bin file from the 2.2.1>2.2 downgrade method for the users phones that came with 2.2. This will make you boot into a black screen where you can hear the boot sounds, from there your phone is unusable. BUT, you can then use the LG software to "upgrade" to the 2.2.1, which will be in working order.
I don't know the actual repercussions of doing this, but hey, you get a working phone and you get to start over on the rooting process. This time though, cross your t's and dot your i's, so that we can better help.