This is listed in the How Tos here:
http://no.longer.valid/phpwiki/index.php/phpMyAdminIt is one of the most popular pages with ~1000 hits.
The 2.5.6-3 installs cleanly and works well on SME 6.0.1 (so does 2.6.0-2)
The RPM installs into /opt
It correctly uses the 'templates' directory tree (rather than t-c)