Help with Infocomm text games on prodos

[teke@milton.ccs.itd.umich.edu (Jeff W. Schroeder)]

Hi all:
 
Could someone please point me n the direction of the infocom system
file that will allow their games to run from apple prodos..
 
I have an older version that will not let me save the position of
my games.  I read in a file that I got down from
grinf.isca.uiowa.edu that on apple's with a thunder clock or
other prodos patch there is a conflict with saving and
restoring games.  The patch I downloaded does not seem to
apply to the version I have.
 
I have two files called
 
Infocom.system
Infoplayobj
 
The patch I have tells me to modify a file called infosnarf
 
can someone bring me up to speed on this???
 
 
Thanx,
 
Teke