Finally, I successed RAMDISK version running now. 
The following messages are shown on my sandpoint. 
Some application programs like zebra protocol daemon, are executed well. 
And telnet at remote system is working. 
But I have a few unsolved prolems. 
(I worked with 20020224 version, 20020424 version had different install
tools.)
1) I made 28M ramdisk.fs and I used almost 20M for / partition. 
    I used 4M for swap partition. 
    "swap" is necessary for RAMDISK version? 
    If so, 4M is not sufficient, I think.
2) I don't know how to get rid of the following error message during
initial procedure. 
    /dev/md0a: file system not clean (fs_clean=4); please fsck(8) 
    /dev/md0a: lost blocks 0 files 0
3) And it need /netbsd at initial step. So I placed GENERIC netbsd at /
directory. 
    I think it's not rigth way. But I don't know how to run without /netbsd.
4) useradd, and vipw couldn't chage master.passwd file.
==================================
....
md0: internal 28672 KB image area 
boot device: <unknown> 
root on md0a dumps on md0b 
root file system type: ffs 
Enter pathname of shell or RETURN for sh: 
tset: terminal type pc3 is unknown 
Terminal type? vt100 
Terminal type is vt100. 
We recommend creating a non-root account and using su(1) for root access. 
# exit 
Thu May 16 23:27:34 GMT 2002 
Starting file system checks: 
/dev/md0a: file system not clean (fs_clean=4); please fsck(8) 
/dev/md0a: lost blocks 0 files 0 
Setting tty flags. 
Setting sysctl variables: 
Starting network. 
Hostname: sandpoint3.etri.re.kr 
NIS domainname: etri.re.kr 
add net 127.0.0.0: gateway 127.0.0.1 
Configuring network interfaces: fxp0. 
add net default: gateway 129.254.168.1 
Adding interface aliases: 
Building databases... 
Checking for core dump... 
savecore: /dev/wd0a: Device not configured 
Mounting all filesystems... 
/dev/md0a: file system not clean (fs_clean=4); please fsck(8) 
/dev/md0a: lost blocks 0 files 0 
Clearing /tmp. 
Segmentation fault - core dumped 
Starting virecover. 
Checking quotas: done. 
Setting securelevel: kern.securelevel: 0 -> 1 
swapctl: WARNING: /var/swap is readable by the world 
swapctl: adding /var/swap as swap device at priority 0 
Updating motd. 
starting local daemons:. 
Starting inetd. 
Thu May 16 23:27:36 GMT 2002
NetBSD/sandpoint (sandpoint3.etri.re.kr) (tty00)
login: root
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001 
The NetBSD Foundation, Inc.  All rights reserved. 
Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994 
The Regents of the University of California.  All rights reserved.
NetBSD 1.5ZA (BINSTALL) #1: Fri Apr 26 13:14:10 KST 2002
Welcome to NetBSD!
Terminal type? [unknown] vt100 
Terminal type is vt100. 
We recommend creating a non-root account and using su(1) for root access. 
# ps 
PID TT STAT    TIME COMMAND 
160 00 Ss   0:00.08 -csh 
163 00 R+   0:00.00 ps 
# df -k 
Filesystem  1K-blocks	 Used	 Avail Capacity  Mounted on 
/dev/md0a	   28015    24223	  3792    86%    / 
# cat /etc/fstab 
/dev/md0a   /   ffs  rw 
/var/swap   none    swap    sw	  0 0 
# ls 
./	    .profile  dist/	 mnt/	  root/	 usr/ 
../	   bin/	  etc/	  mnt2/	 sbin/	 var/ 
.cshrc    dev/	  files*    netbsd*   tmp/
=========================================
Boo Geum Jung 
Senior Member of Research Staff, 
Network S/W Platform Team, 
Internet Technology Laboratory, ETRI 
161 Kajong-Dong, Yusong-Gu Taejon, Korea, 305-350 
Tel:+82-42-860-5315 home:http://circle.etri.re.kr/~bgjung