Is there any tool that can understand the format of comps.xml?Thanks in advance!

[王秀文]

everyone,
  hello!
  I am customizing the installing CDs of FC4 into only one
CD.Must i  manually edit the file comps.xml and remove the
unnecessary groups and rpms.
  I am wondering if there is a tool that can understand the 
format of comps.xml.All i need to do is to select the group(s)
and rpm(s) needed.And when i commit i get the workable 
comps.xml.
  Or is there any tool that can make the job easier to do?

  Thanks!^-^

  mosquite