I can help! i installed mambo 4.5.2.3
still need the help installing it urself? i'm here!
**unzip the archive (.zip file) to you desktop, open up ur FTP program then uplaod it to the public_html folder...**
Make the MySQL DB named: mambo1 or something liek that. then make a user (scroll down a bit) make a user : mambo1!...
then basically follow this tutorial @:
Mech7.net
Yes, i know its version 4.5.1b ( the version in fantastico) but it oes the same way for 4.5.2.3
If you don't want to go into all of that, just use fantastico or the addon scripts page in cpanel! :grin: