Simtel MSDOS Archive CDROM, March 1997.  Walnut Creek CDROM.
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 Manipulating environment
 path: \disc2\envutil 
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advset14.zip Advanced Set: Enhancement of DOS SET command
apath24a.zip Advanced PATH modification utility v2.4a
enved10.zip  Modify environment & write changes to AUTOEXEC
fsplit10.zip Puts given path components into envir'mt vars.
mp.zip       ModPath: Modify MS-DOS search path, w/TC src
mzee1_0.zip  Multi-featured mouse based environment editor
sset11.zip   SuperSet v1.1: DOS environment extender tool
stnvjw25.zip Set environment variables, v2.5, w/ASM source