In this archive the file 'SHEL_FIX.PRX' is the original, and 
'SHEL_FIX.PRG' is an updated version by staylor@cix. Here are his 
comments:

>From: staylor@cix.compulink.co.uk (Steve Taylor)
>
>Please note that the binary mail file 'SHEL_FIX.ZIP' has been uploaded,
>
>This is XBRA compatible. All it needed was the SHFX XBRA ID adding, it
>already had an incorrect XBRA implementation. Traps 1,2,13 intercepted.
>Thanks due mainly to jeason for sending me a full disassembly.
>
>It loads OK but I don't use it so I don't know whether it really works,
>since all I did was add three 4 byte strings then it ought to work.
>Let me know if it seems OK and I'll ful it to /listings properly.
>
>Steve.

John W.