That's no problem, we read each post to determine if it's contributory or abusive
Yeah, you can definitely perform a pixel stretch on these buttons.
The best one to work with looks like the "Home" one.
What you'll need to do is open it in GIMP, and zoom in until you can see individual pixels.
Then use your rectangle tool to make a 1 pixel high selection across the width of the button, just enough to span the text.
Once you've done that, copy it and paste it on its own layer.
Now you simply need to transform it, pulling the bottom edge of the selection over the text.
Once you've saved that button, you can use it as a template to create each button with the text you desire, just make sure you save a copy of the button with no text on to work with.
Best of luck, any other questions, don't hesitate to ask