Scheduled Draft Publish ''every minutes instead of hours''

Well as i said in the title, i’m using this wonderful plugin Scheduled Draft Publish by dagondesign.

You can find it here

Unfortunatly this plugin have Draft Publish Delay only for hours. How can i use minutes instead of hours? I’m posting here because is a very simple plugin, and most of you know php. I don’t :/ If anyone can help me make this code work with minutes.

Here is the code

Thank you in advance!