File list (Check if you may need any files):
AttachPdf
.........\build
.........\.....\classes
.........\.....\.......\attachpdf
.........\.....\.......\.........\Main.class
.........\.....\.......\net
.........\.....\.......\...\opro
.........\.....\.......\...\....\util
.........\.....\.......\...\....\....\pdf
.........\.....\.......\...\....\....\...\AttachData.class
.........\.....\.......\...\....\....\...\PdfAttacher.class
.........\.....\.......\...\....\....\...\PdfFile.class
.........\.....\.......\...\....\....\...\PdfModifier.class
.........\.....\.......\...\....\....\...\TestPdfModifier.class
.........\build.xml
.........\dist
.........\....\AttachPdf.jar
.........\....\lib
.........\....\...\iText-2.1.2.jar
.........\....\README.TXT
.........\libbb
.........\.....\iText-2.1.2.jar
.........\manifest.mf
.........\nbproject
.........\.........\build-impl.xml
.........\.........\genfiles.properties
.........\.........\private
.........\.........\.......\private.properties
.........\.........\.......\private.xml
.........\.........\project.properties
.........\.........\project.xml
.........\pdf
.........\...\Copy of lecture16.pdf
.........\...\lecture16.pdf
.........\src
.........\...\attachpdf
.........\...\.........\Main.java
.........\...\net
.........\...\...\opro
.........\...\...\....\util
.........\...\...\....\....\pdf
.........\...\...\....\....\...\AttachData.java
.........\...\...\....\....\...\PdfAttacher.java
.........\...\...\....\....\...\PdfFile.java
.........\...\...\....\....\...\PdfModifier.java
.........\...\...\....\....\...\TestPdfModifier.java
.........\test