I want to get some rpm files from the rawhide distribution.
	Problem is, they all use RPM 4 format. And I have RPM 3.04.
	That would not be a problem, I've thought. I can upgrade.
	But I can't: since the RPM 4 rpm is in RPM 4 format, RPM 3
	cannot use it to upgrade itself.

	That's the command-line I've tried:
[root@sheilamello rpm]# ls -la
total 5141
drwxr-xr-x   2 root     root         1024 Jun 16 02:30 .
drwxrwxrwx  15 root     root         2048 Jun 17 17:43 ..
-rw-r--r--   1 root     root      1948684 Jun 16 02:18
rpm-4.0-0.33.i386.rpm
-rw-r--r--   1 root     root      1722979 Jun 16 02:05 rpm-4.0-0.33.src.rpm
-rw-r--r--   1 root     root        59803 Jun 16 02:18
rpm-build-4.0-0.33.i386.rpm
-rw-r--r--   1 root     root      1474275 Jun 16 02:22
rpm-devel-4.0-0.33.i386.rpm
-rw-r--r--   1 root     root        25902 Jun 16 02:22
rpm-python-4.0-0.33.i386.rpm                       

[root@sheilamello rpm]# rpm -Uvv *
D: counting packages to install
D: found 5 packages
D: looking for packages to download
D: retrieved 0 packages
only packages with major numbers <= 3 are supported by this version of RPM
error: rpm-4.0-0.33.i386.rpm cannot be installed
only packages with major numbers <= 3 are supported by this version of RPM
error: rpm-4.0-0.33.src.rpm cannot be installed
only packages with major numbers <= 3 are supported by this version of RPM
error: rpm-build-4.0-0.33.i386.rpm cannot be installed
only packages with major numbers <= 3 are supported by this version of RPM
error: rpm-devel-4.0-0.33.i386.rpm cannot be installed
only packages with major numbers <= 3 are supported by this version of RPM
error: rpm-python-4.0-0.33.i386.rpm cannot be installed
D: found 0 source and 0 binary packages
[root@sheilamello rpm]#