Moving from Lua 4 to 5

["Firestone, Rameses" <rameses.firestone@...>]

We have been using Lua 4 for about a year and now I want to switch over to
the latest version. In order to make Lua work with our software I hacked the 
I/O library so that it could optionally accept functions as I/O 
descriptors. I did this so that I could take control of I/O directly. Our 
software is mostly GUI oriented and we use QT so that it is portable. 
With call back functions for descriptors, I could read and write to specific 
windows with no problems. My questions are:


a) Can I use the old I/O library with the new Lua until I have time to modify 
   the new library? I know the syntax is different but will it work?

b) Is there a better way to do what I want than modifying the library? I need
   portable solution that will run on both Unix and Lose-dows.

Ram