You simply rename the file to it's former name.

!!!NOTICE!!!

As of Minecraft release 1.6 the font file names changed!
Before they was named "alternate.png" and "default.png"
The new naming format is "ascii_sga.png" (for "alternate.png") and "ascii.png" (for the font in game aka ex-"default.png")

They also may not work properly if you do not use HD fixer like MCpatcher or OptiFine!
Mojang claims it is a known fact to them, not a bug, it is because they did not yet implemented a font properties file
which should solve the issue with fonts after 1st restart to mess up.

If you use the HD Fixers, keep in mind that now here are 3 Font folders (donīt ask me why...).
The 1st one is to be found in the main resource pack folder (= /resourcepacks/Ornate RR/assets/minecraft/...) - should contain only the "glyph_sizes" file
The 2nd one is in the textures folder (= /resourcepacks/Ornate RR/assets/minecraft/textures...) - should contain only the "unicode_page_00" file
The 3rd one is located in the mcpatcher folder (= /resourcepacks/Ornate RR/assets/minecraft/mcpatcher...) - there should be the font .pngs (alias "ascii...")
(I canīt say if Optifine uses the same folder setup as MCpatcher does as I am not using OF anylonger)

!!!!!!!!!!!!


Here are 2 variants of fonts. One named ascii_sga.png, that one is for the random text you can
see in Enchanting table. Using those files for standard text in minecraft is not the best idea ;)
The second font type is named ascii.png - It is used for the fonts you see in the game, menu, chat, etc.

So... if there is an alternative font file which start with word: ascii_sga...
it means you have to delete anything behind that word, and then just copy-paste this file
into the Fonts folder within the Ornate Resourcepack folder into ".../Ornate RR/assets/minecraft/mcpatcher/font..."

If the alternative font file start with word: ascii...
you will delete anything behind that word and copy-paste that file into the Fonts folder
within the Ornate Resourcepack folder into ".../Ornate RR/assets/minecraft/mcpatcher/font..."


Example A:
~~~~~~~~~

You would like to exchange the current Ornate "default" font for the better readable one
The font is named: "ascii(4) - smooth fonts, better readable - brownish"

To use it in game follow those simple 3 steps

1. Delete/Rename the currently present "default" font in:
\.minecraft\resourcepacks\Ornate 5 Re-resurrected - with Alternatives-converted-[mc1.6]\assets\minecraft\mcpatcher\font
it should be named: "ascii.png"

2. Copy & Paste the new font into:
\.minecraft\resourcepacks\Ornate 5 Re-resurrected - with Alternatives-converted-[mc1.6]\assets\minecraft\mcpatcher\font

3. Rename the newly copied font to: "ascii.png"


That's it! :)


Example B:
~~~~~~~~~

You would like to exchange the current Enchanting Table "alternate" font for the runic one
The font is named: "ascii_sga(3) - runes"

To use it in game follow those simple 3 steps

1. Delete/Rename the currently present "alternative" font in:
\.minecraft\resourcepacks\Ornate 5 Re-resurrected - with Alternatives-converted-[mc1.6]\assets\minecraft\mcpatcher\font
it should be named: "ascii_sga.png"

2. Copy & Paste the new font into:
\.minecraft\resourcepacks\Ornate 5 Re-resurrected - with Alternatives-converted-[mc1.6]\assets\minecraft\mcpatcher\font
3. Rename the newly copied font to: "ascii_sga.png"


You are done! :)



In case you deleted the previously used font and want to revert back to it, you can find it in the "Alternatives - Ornate" folder under "fonts".
In case you deleted it even from there simply download this TP again from the following official Ornate Re-resurrected TP link
http://www.minecraftforum.net/topic/1592101-ornate-5-re-resurrected-64px-mc-15/


==============
!!!REMINDER!!!
==============
If you found those informations usefull visit the TP topic and VOTE UP my post, or just leave a comment in the topic on minecraftforum.net and/or planetminecraft.com :)