Problem with stuff leaving after kernel un-installation

[Alerander]

Hi, here i have a question just want to know.
I re-compiled some kernels via src.rpm on fedora before, and have removed them. What i have done just removed them from grub.conf and vmlinuz, System.map etc in /boot. But now i found that, there are many modules belong to those deleted kernels in /lib/modules:

[leeyee@workstation ~]$ ls /lib/modules/
2.6.11-1.1369_FC4  2.6.12-liye        2.6.13-1.1986_Liye  2.6.13-liye
2.6.12-1.1456_FC4  2.6.13-1.1526_FC4  2.6.13-2.1532_FC4

Out of them, 2.6.11 was installed along with fresh installation, and 2.6.13-2.1532 is the current using one! But how about other modules? They were all installed via source RPMs except 2.6.13-1.1526, it's installed with RPM. Then, If i can delete them safely?
Besides that, another question, which way can we uninstall a kernel absolutely installed via tarball or source rpm?
Thanks here!

[LocutusOfBorg]

Besides that, another question, which way can we uninstall a kernel absolutely installed via tarball or source rpm?

For a tarball, there should be a "make uninstall" command to be run in the top directory of the source tree; if not, just delete the kernel, the initrd, the map file and the modules in the corresponding directory under /lib. Then fix the grub.conf file, as you already did.
If you generate a new rpm from the srpm, "rpm -ev nameofthepackage" will erase it and fix the grub.conf file.
You have to manually delete the sources installed in your rpmbuild tree by the srpm itself.

[Alerander]

Okay, thank you!
I will delete those modules.