The method is actually very simple, everyone can do it by themselves oh ^_^
Use Photoshop to assist
First of all, you have to find a pattern that you like, Meizi of course is to take photos of their own family, my daughter is very cute oh, oh.
Then I use Photoshop, you can use your own custom image software, the size of the map to adjust to: wide pixel the size of the pixel, which is in line with the original OS X of the size of the boot screen.
Store format as PDF and then save this file, here, remember, the format must be in PDF format. If you're using Photoshop like I do, then there's a place to choose format when you save it, remember, to choose the PDF format, and remember that the file name is stored Bootpanel.pdf
A lot of people file names are right, but the format is not selected, this is not the case.
Finally, put this file in
/system/library/coreservices/systemstarter/quartzdisplay.bundle/resources, there was one here. Bootpanel.pdf, this is the default pattern, you can move it to another place, and then
Let yourself do it, reboot, La La la, you can see a Meimei boot screen.