It would not remove any existing MSJVM installations.
Anyway for clean Windows XP SP2 installation, you got several options:
You can use Windows XP SP1 (not SP1a) to slipstream with XP SP2
You can download MSJVM from
http://www.download.windowsupdate.co...a04af2b34d.exe
You can download Sun Java from
www.java.com
Cheers,
McoreD