download link 5.50GEN----> http://www.megaupload.com/?d=G4PG9G03

download link 5.00---------> http://www.mediafire.com/?0ygzh2rferj

1-download the file cxmb5.50GEN
2-extract it
3- u should have cxmb , seplugins folders and 2 themes
4-copy the cxmb and seplugins and paste them in ur memory

5-copy the 2 themes in ur themes folder and ur themes folder in ur psp folder

6-shut down ur psp completely
7-turn ur psp on while holding R button
8-go to plugins and enable cxmb
9-ur done go to settings then theme settings and choose a theme