XP Service Pack 2 and browser compatibility

I now have SP-2 RC-2 version 2162, and all is working fine with both IE and Mozilla....So far...However, microsoft has issues with the new build and other browsers I've heard, and are now attempting a fix.  Just have to wait and see 

 thats   great  to  know,  but  for  someone like  me is  having a  hard time  installing any of    Microsoft Window XP Home Edition SP 2,  well  my situation is is that   never understand it,  but have a  win32 application , including  along with that   .X86    and  when i  ready to  install it  after a  long  download, and  couldn't  download  and install from Automatic Updates,  and  try with out that and  now  i have it on my  CD  but  won't  install because its not  a valid win32 application.  now  what  where do i  go and do that free version  update

I have Microsoft Window XP Home Edition SP1,  with a  win 32   not even a  sp1a  works  same as sp2  darn  soon  to go and buy  Microsoft Windows XP Home Edition Proffessional

excuse me  for my spelling not a  great  speller