Enter the file name of the color map file. Don't enter the complete path to the file, just the filename. Common sizes are 512x512 or 1024x512. The 'x' must be a lower-case 'x'. 15 is a good number.
Larger numbers yield slower rates of change.
150 frames per image is very slow. The program will then begin recording the rasterfiles onto tape. After the recording is complete, a screenful of information about rewinding the tape will appear. The tape will rewind automatically after the preblacking is complete. This should bring up the color bar pattern on the monitor.