Lifting images off of images?

Hi List Members!

First question:

I have a scanned logo image, two colors, in .TIF format.  The background
color is light green, and the lines and text on the logo are black.  I want
to change the background color to dark green.  Short of mopping the entire
light green area with a brush, zooming waaaaaay in and coloring next to the
black (to preserve it), how can I do this?  Does it have to do with layers?
 I have PSP 4.0 <blush>, and Image Composer 1.0 <blush more> to work with.

Next question:

I also have two .GIF files that I got from associated websites to use as
links.  I need to do the same thing to them.  I have been lurking here for
some time, and rarely have asked a question...not because I haven't had
any, but this list amazingly answers them before I can ask.  And, I do know
how to search the archives, but I'm lost there because I just don't know
what to call the process that I'm trying to learn.  Any help out there?

TIA,

Mike

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