It sounds like you are trying to create 'text on a path' - in this case, the path is a curve, right?
You cannot do this in Pagemaker.
You need either Illustrator or Coreldraw or Photoshop or .... You can even do this in MS Word.
In a Word document, go to Insert>Picture>Word Art which brings up the Word Art Gallery. There are a number of different styles available and one of them looks like what you have described you want to do. Select the style you want by clicking on it, click OK and this brings up the Edit Word Art text box. Here you can type in the words you want to use, the font, the size and bold/italic. Click OK and this places your Word Art on the page.
You can further format the Word Art re colour, size, kerning, etc. before printing.