I have a question about merging 2 or more files into one pdf. Is this possible with DoPdf? How would one do this? I need to create one pdf with a powerpoint handout and 1 to 3 word files.
Thank you.

No, doPDF cannot merge PDF files (or other files into a single PDF). In order to have those files together you would have to import the 1-3 word files into the powerpoint itself in the order you want them in the PDF.

Tools required: bycypdfasm.exe from http://www.becyhome.de/download_eng.htm#becypdfasm and mbtpdfasm.exe from http://thierry.schmit.free.fr/spip/spip.php?article14

put the 2 exe files in the same folder.
print the ppt and doc files and create 2 or more pdf files first, run bycypdfasm, save the combined file using a different name from any of the input pdf files, done!

You could also try Gios PDF Splitter And Merger 1.12 (Freeware), available from:
paologios.com/products/?type=bin
I have found it useful for splitting and merging PDF files.
Only thing to be aware of is that it requires .NET framework version 1.1, but that's already installed on many computers.