How to convert directories with BMP files
This is Sample3.bat contents:
Bmp2PDFPilot.exe /A "Sample files\*.bmp" /O "Sample PDF files\Sample3.pdf" 
Files list to convert:
All BMP files from directory "Sample files"
Used required switches:
/O - required switch. Here it tells program create PDF file "Sample3.pdf" in "Sample PDF files" directory
Used not required switches:
/A - auto open 
Program create 3 PDF files from files:
clock.bmp, globe.bmp, scheme.bmp, located in directory "Sample files"
Program create PDF file Sample3.pdf in directory "Sample PDF files"
from files,located in directory "Sample files" 
All bmp files from this directory will be included
If output directory does not exist, it will be created
When converting process is complete, PDF file "Sample3.pdf" will be opened