building rpms from source rpm's or tgz files

[soulreaver <soulreaver extension2 freeserve co uk>]

Any chance someone could point me in the right direction. every time i
have downloaded the source rpm and tried to create a rpm for my system i
have cd to /usr/src/redhat/SPECS and also tried /usr/src/redhat/SOURCE
and then tried to compile the rpm with the folowing command:

			rpm -ta name of file.tgz
			     
			                    and also
			
			rpm -ba name of file.spec
			
			                 and the
			
			rpm --rebuild option
			
			the only one to have worked so far is the nvidia
			drivers src rpm, all the others give me errors
			regarding:
			
			version field must be present in package: (main
			package)
			release field etc.etc
			and so on 
			
			checked the man page for rpm , still none the
			wiser
			
			any chance someone could put in the wright
			direction please
			
			p.s sorry about the spacing 'using evolution and
			keeps defaulting to this section every time you
			press the tab'
			

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