The default background of the log on screen can be found under
/System/ Library/CoreServices and file is named "DefaultDesktop.JPG".
Before replacing this file by another, it's nice to have a copy stored somewhere else (in case of restore is required).
Image properties of the new picture should be 2560 × 1600 pixel with a resolution of 72 pixel per inch (for Mac Book 13,3''). (optional)
Afterwards the new picture is renamed into "DefaultDesktop.JPG". Go to the directory /System/ Library/CoreServices and overwrite the old default background with the new picture.
Change can be seen after reboot.
use a kind of virtual machine like:
http://www.parallels.com/de/products/desktop/
If your Mac computer has an Internet from Chello, the only way to share it is the following steps: 1. Go to Control Panel (you find it in your Finder) 2. From the menu Internet and Network choose Sharing 3. After this step, you see on your Control Panel, a list of computer's sharing possibilities (File sharing, Web sharing, Screen Sharing and so on....) 4. Choose an Internet sharing 5. Define how to use an Internet together (through Ethernet in this case) 6. Define how the other computers get your Internet (throhgh Airport in this case) 7. Further more you could define a password in order to protect your connection from unknown users, or just leave without password if you dont mind that other unknown users use your Internet. That are probably all steps!!! And it should definitely work, if you follow this instruction clearly.
If your Mac computer has an Internet from Chello, the only way to share it is the following steps: 1. Go to Control Panel (you find it in your Finder) 2. From the menu Internet and Network choose Sharing 3. After this step you can see on your Control Panel a list of computer's sharing possibilities (File sharing, Web sharing, Screen Sharing and so on....) 4. Choose an Internet sharing 5. Define how to use an Internet together (through Ethernet in this case) 6. Define how the other computers get your Internet (throhgh Airport in this case) 7. Further more you could define a password in order to protect your connection from unknown users, or just leave without password if you dont mind that other unknown users use your Internet. That is probably all steps!!! And it should definitely work, if you follow this instruction clearly.