HELP TO compile PHP in linux

HI all; Please help me to compile php as i m not so expert in Linux, i have one installed php 4.1.2, and i downloaded the 4.3.2 one.. I need to upgrade because i need the new one with iodbc support not unixODBC. and i need it with ofcourse ( mysql - gd - iodbc (odbc) - mssql - apache .... ) I have read so many articles all over the web, and i reffered to php.net ... MY PROBLEM is that i m new to linux and when it come to specify the DIR , i got lost... and when i make the ./configure , then make then make install ,, i got errors always .., i untared the file in /usr/local/src and after everything done , i echo phpinfo() and i got the version still there !!! I installed RedHat 7.3 ... the current php that came with redhat is perfectly working just i need to make mssql and iodbc work... so if there any other way please help me.. Please help me in details