Why etc\rcd folder on netware 6.5 OES sp1 server for?

I am not using any unix services on my server...
Also notice following on autoexec.ncf

#SYS:/BIN/UNIXENV.NCF

#---Added by rcd.rpm install ---
SEARCH ADD sys:/usr/sbin

#---Added by rug.rpm install ---
SEARCH ADD sys:/usr/bin

Do I really need them or no?