Extra care must be taken when altering ANYTHING in your ini file. Your ini file can be damaged. I have highlighted the code to make it easier for you to find during the instruction, it will not appear coloured in the ini file.
Standard Nightglyder Wings flying and nonflying versions

This is golem, he is a standard Worlds avatar. Open your ini file. His code will look like this:

VIPAVATAR=avatar:golem.rwg

Open your customization palette and change golems head to somguy; this will expand your line of code, exposing the individual body parts. The line will now look like this:
To put wings on your left arm look in the line of code above and locate the letter M . It will be followed by the letter b . Insert 0bGnightglyder after Mb That part of the code should now look like this:
VIPAVATAR=avatar:golem.0ET4golemT4golemT4golemT4golemT4golemT4golemPeLbMbO aRbUbVaWeXeYaIeJeKaBb0bNS000GsomguyQaHDgT2somguyT3T2T1Q0f.rwg

PeLbMb0bGnightglyderOaRbUb

VERY IMPORTANT= The 0 in the 0bnightglyder is a zero not the letter O.

You now need to go to File (up in the top left of your .ini file) and Save this change, once done you will need to TELEPORT to activate the change.

To put wings on your right arm you will now need to find the letter U . It will be followed by the letter b Insert 0bGnightglyder after Ub. That part of the code should now look like this:

PeLbMb0GnightglyderCaRbUb0bGnightglyder

You will need to Save this change and to TELEPORT the same as you just did for the first wing. This avatar now has wings but does not fly.

To make him fly follow the instructions below:

Find the letter P . It will be followed by the letter e . Insert Ggolem after Pe . Now go to the beginning of the line of code. You will see this:

VIPAVATAR=avatar:golem.OETgolem............

Highlight golem and overwrite it with nightglyder

The finished line will look like this:

VIPAVATAR=avatar:nightglyder.0ET4golemT4golemT4golemT4golemT4golemT4golemPeGgolem LbMb0bGnightglyderOaRbUb0bGnightglyderVaWeXeYaIeJeKaBb0bNS000GsomguyQaHDg T2somguyT3T2T1Q0f.rwg
You will need to Save this change and to TELEPORT the same as you did when making the wings.
IMPORTANT: As with all avatar code on this site the VIPAVATAR line must be continuous and unbroken Use your delete key to accomplish this.
SIZING NIGHTGLYDER WINGS
COLOURIZING MACAW WINGS

*You can add, colourize, and size wings plus change actions on any avatar.

If your avatar disappears look for SZZZ in the line and change it to SYZZ or SZZY