You should be able to. I'd make the thread and then ask Allelujah to close the old one for you. I'd do it now, but I'm coloring some lineart for someone right now.
Hey there Euphoric!
I have a question... I have a graphics showcase which died about a week and a half ago. Now I want to open a graphics shop combined with my showcase, sort of like what you did. My question is, can I have my showcase closed, and then start a new thread with the two combined?