Repligo actually involves two programs - the PC converter (paid software) and the PPC viewer (free). To view files on your PPC, you must first convert them into the Repligo format using the converter program on your PC. Then you can just copy the file over to your PPC to view using their viwer program.
Have you looked at the Repligo site? It will answer a lot of your questions.
Repligo Site
Moved to Applications.