Adding custom text after portable USB drive letter

Kinda fancy question, but how can I add custom text after portable drive letter name?

My DVD has the following name pattern:

• Label (DriveLetter:) CustomText

But my other USB portable drive has:

• Label (DriveLetter:)

Studying the autorun.inf I discovered the action field, but modifying it doesn’t work.

Does it matter that device type is DVD?
What software can I use to change this text?

My reputation does not let me post
images, so here’s what I mean