Better use of quicklook

I'm aware that there are extensions for Quicklook and have a few installed, but they're not so useful to me because the default apps have their own icons that are being used instead of live icons. Is there any way to suppress this behavior so I can view things like my ASP or shell scripts instead of a useless doc icon from Adobe (or textmate, etc)?

 

I downloaded QLColorCode and then downloaded a patch that adds UTI defs of public.plain-text for most of Textmate's supported filetypes. I then did a find and replace on public-plain-text with public.source-code to get those files to use the ColorCode plugin and now I have highlighted source for all the filetypes I use.