um, don't bother reading this. I wanted to keep this somewhere where I won't lose it easily....

((?<SName>.*)(\..*)|(?<SName>.*))((?<SNumber>[0-9])(e|E|x|X|\.|_|-)*(?<ENumber>[0-9][0-9])|(s|S)(?<SNumber>[0-9][0-9])(e|E)(?<ENumber>[0-9][0-9]))(
-(?<EName>.*)|.*)\.(?<FileType>...)

and don't bother asking what it does either... If you're geeky enough to see what it does, then feel free to use it (you deserve it!)