how can snmpd show more informations?

Hi there,

im just new to snmp, and it's not clear to me how can snmpd shows more
information...
i use php with snmprealwalk function to give me the entire tree, perhaps i
need more information, so i tried to specify mibdir and even mibfile but
without any luck, snmpd shows the same info (yes, i also restard the deamon
after config changes).
if im correct, do i need to re-compile snmpd and adding MIBs using the
option --with-mib-module ?
or it should just works spcifying mibfile in the config file?

Thanks in advance for your help!