General :: Editing / Making A Keyboard Map?

I am just entering the Linux world. All these years I wanted to test Linux but did not have the resources to make a new computer. Then I found Puppy Linux by chance. Nearly all the work I do with Windows 7/XP can be done with Puppy Linux. I am running it from a CD. I developed a smartfont for an Indic language called Sinhala, which uses ISO-8859-1 (Latin-1, SBCS) character set.It makes typing Sinhala, one of the more complex of Indic scripts, easy.

Essentially, this is a transliteration of the 'complex' script into Latin character set and then showing it back in the native script by way of the smartfont. See it here: [URL] Of course, you have no clue what it says. If you copy the text and look, you'll understand what is going on. You can type it with the dead-key keyboard. Only problem is that in certain situations, the font makes conjoint letters where you don't want them. You can prevent it by inserting the ZWNJ, Zero-width non-joiner (u200C), but the keyboard does not have it. Is there a way to edit the keyboard layout and make a modified key layout?