Ok..here it is... this is for all of you noobs that really want to know..mainly because i have been getting a bunch of emails asking me how to use it.
1) Download KXPLOIT from pspupdates or you can click here
2)Then open it with winrar and extract the KXploitTool-0.3-Setup.exe and it should start the installation.
3)Open the program and where it says Nombre:, enter the name of what you want the finished files to be called.
4)Where it says fichero PBP, click on the ... and select the eboot
5)From the Unidad PSP selection, select the drive in which your psp is located
6)Finally, click Generar ficheros and there should be a pop up
7)Then exit and your done, you will have 2 newly created files ready to be put onto your 1.5 psp
*THNX TO Killer-X and PSP-Dev for the App*