You have your character on a white background? Just use the magic wand. Click somewhere on the white. Right click and click "Select Inverse." Then just copy and paste the selected area to your other image.
GMail is undoubtedly the best free Email service currently available. Unfortunately it's still in beta, and probably will be for a couple of months. (Luckily, I got an invite by giving away a Diablo II item)
I'm not sure if you mean to just make it look like you made it with vectors, or to actually draw in the vectors, so, just go here: http://www.good-tutorials.com/search.ph ... submit.y=0
I don't believe in ghosts, and all those TV shows where people claim to have made contact with ghosts definately don't help me to believe. I just won't believe it until I see some evidence of it.
It's not that it looks bad, it's just very basic. Seems a lot like you just made some clouds and put the text and image on it, then added a few effects. 5/10.
Honestly, I really like it. While colors on the orange spectrum may be more suited to Linkin Park, I think the sig looks great with it's current colors. 8.5/10.