DB2

I found this helpful link.

• Mount your EXT2 Partition On Windows NT/2K/XP (EXT3 too) driver
  http://kennethhunt.com/archives/001314.html
  

It introduces 3 tools:

1. EXT2IFS
2. Ext2Fsd
3. Ext2 Installable File System For Windows
   

EXT2IFS

I try EXT2IFS first.

1. run the service.exe of ext2ifs.
2. Install Driver at step 1 (manually startup).
3. Plugin my USB hdd which contains EXT3 partition.
4. I can not find the EXT volumes at step 2a. but found them at step 2b, then assigned driver letter for each them.
5. reboot.
6. After reboot,run the service.exe.
7. go to step 3, click Start Driver because I choose manually Startup at above.
8. then all the driver letter I assigned above are available now. Bingo!
9. I copy files from the EXT3 partition successfully, but this driver does not support Write feature. this EXT3 partition is read-only for Windows XP.

NOTE: Explorer gets random crash when using this driver.