thankx harken but what about the second query???

Like I told you before, I'm not familiarized with rpms but, yes, the name has nothing to do with the kernel version itself. You can name it whatever you want as long as you go through all the compile & install steps as you should and you point the bootloader to the right file.
I think basically what you want should work but look again what abysko00 said:I don't want to mislead you in any way so for rpms you'd better post in the RedHat forum.

Concerning your question if the sources of 2.4.25 fit to the kernel 2.4.25-something:

Yes and no! The number behind the dash is the EXTRAVERSION of your kernel, as defined in the Makefile. This is used to distinguish between kernels from the same source but with maybe different configuration or patches. In the later case you need to be careful, since a patch modifies the source.

Again, I can only provide an example from SUSE and must, just like harken, direct you to a RedHat forum: in SuSE, the version of the kernel binary has to fit exactly the version of the sources, in case you want to compile driver for example. This is because SUSE patched the kernel and gave it a new extraversion.

thankx a lot abisko00 and harken

Hopefully it will be sorted at the redhat