elziko -
You can make a start by opening your project file in notepad, and looking at what you've got references to. In addition, you should ship the MSVBM60.DLL (VB runtime). If you do any data access, you should ship the latest MDAC_TYP.EXE (available at msdn.microsoft.com/data). The tricky part comes in where you have to look at your list of references that you've used, and figure out what their dependencies are.
Chip H.