question about processes in windows 98 i found using wintop

[dabuddha]

do any of these sound familiar or does anyone know what they're for?
c:\windows\system\mprexe.exe
c:\windows\system\stimon.exe
c:\windows\system\wmiexe.exe
c:\windows\system\ddhelp.exe
c:\windows\system\pstores.exe

those are the four im not sure about
thanks for any help and sorry if this is a repost of any kind