trade session time

Can anyone alter this indicator where you can set it in minutes as well as the hour?

I want to use it on 15 chart. So need to set the times on 15 minute increments instead of only hourly.

I spun this up a long time back, maybe it's along the lines of what you're looking for. Based on user inputs (start/stop times) it draws lines representing various trade sessions.

http://img89.imageshack.us/img89/5493/ssnn8.gif

that's really nice.
here is the one i use.