select everything EXCEPT what you want to be transparent*
copy it
create a new transparent layer
delete the current layer
paste
*or select the transparent bits, right-click and invert selection
edit: I missed the point a little, there
(
Lord Keeps meaning to procrastinate.,
Wed 28 Feb 2007, 22:50,
archived)
yes you did :)
(
Neon Blue Ah ha ha haa! I feel positively capital!,
Wed 28 Feb 2007, 22:53,
archived)
at least i now have a transparent-guide post
to point people at
(
Lord Keeps meaning to procrastinate.,
Wed 28 Feb 2007, 22:58,
archived)