^^Its the installation time !!!
Normally 2007 installs in less than 10 mins..then another 5-6 mins or so for sp1 installation.
But if I extract the updates to the Update folder and then run installaton then the installation takes about half an hour ! (I doono why...my comp is a reasonably fast dual core with 2 gb ram)

Not only that..I believe that installing a pre slipstreamed setup is a more cleaner process...leaves no redundant file or registry entries behind !

Actually I've heasr that technet subscribers have access to pre slipstreamed unmodified copies of every major ms softwares...would be very greatful if somebody can provide me the link of that !