If you’re using FontCreator to create your font, then you really don’t need to write the accented characters at all. Write the A-z, digits, and accents on a plain paper sheet of paper with a ruled sheet underneath for guidance, and scan the entire sheet.
Follow the method in this Tutorial thread: Scanning An Entire Alphabet — to get the letters into FontCreator, pasting them into the appropriate positions on the Glyph Overview.
To create an accented character in the Home Edition of FontCreator, copy the letter and the accent, e.g. A and ¨ and in the glyph overview, open the Ä glyph edit window, and paste both letters to create a composite glyph. Adjust the position of the accent until it looks right.