Second one - not long. It was just a matter of adding the text, and resizing it.
First one took a while - about 15 mins just to add the text, because you have to do it one letter at a time. If you want to see what I'm talking about, click
here. It's a tutorial (not that I need it, but just to show you what I'm talking about), and it's a .pdf file which means you will need Adobe Acrobat Reader to view it.
It took about half an hour - maybe even closer to 45 mins the first time I did it, because I did a lot more to the logo than changing the text.