Stacks as data vehicles

[Troy Rollins]

We have a standalone project which relies on an external stack as a data 
vehicle, e.g. the standalone opens an external stack to gain some 
required information. I would ideally like to change the extention (PC) 
and the filetype(Mac) to allow that stack to launch my standalone with 
the vehicle stack as an environment parameter. Key Ray graciously 
provided insight for much of this process, but we are still stuck with 
the stack filetype part. Basically it works like this -

One standalone has an internal stack which it copies and writes to a 
file (it is at this point that I would like to change its filetype.)
Another standalone opens that stack and uses the information within.

The problem is that the vehicle stack always has the Rev stack filetype, 
and we have yet to be able to change it. How can I change the filetype 
of an existing file? The PC part seem to be handled already just by 
changing the extension.

TIA!!
--
Troy
RPSystems, LTD
www.rpsystems.net