Plot Styles Problem

I currently have a drawing which i am tryiny to plot but the only plots styles options that i am given are stb files, is there a way to unload these and load my ctb files to the drawing.

Thanks in advance

Yes. Using explorer you can drag and drop.

Usually at this location:

Drive:\Documents and Settings\Your name\Application Data\Autodesk\AutoCAD ####\R##.#\enu\Plotters\Plot Styles.

The command is CONVERTPSTYLES.