transfer Java source file into AS400 IFS

Hi, all,

This is a general question about transfer Java code/class files from Window
PC to AS400 IFS in order to run Java program on AS400. Currently, I am using
Operation Navigator to drag and drop the files from PC to AS400.  It is very
easy and works.  But some of our clients do not have Operation Navigator.  I
have tried some other ways, but none of them works:

1.  I mapped AS400's IFS directory into my PC's driver, then copy/paste the
file into the mapped driver.  I got access denied error.  The directory on
AS400 was created by me.  I have full control on it.  I don't know why.

2.  I tried FTP from PC to AS400.  But I can only FTP to an AS400 library,
not in a IFS directory.  Of cource, I could then copy the files from the
library into IFS using CPYTOSTMF.  But that will take two steps and I have a
lot of files to transfer.

Is there any other ways to do this?