What do I need to do to get a replacement CD-ROM (software) to be able to print nail designs?
There is no need to obtain a replacement CD-ROM since there is a version of the software already hosted on the Internet. You need to visit the below link and then download the version for your operating system. Based on the information found on the website, you can install the application on Windows XP, Vista and Windows 7.
Download page: http://service.mattel.com/us/TechnicalProductDetail.aspx?prodno=V5152&siteid=27&catid1=506
Note: Make sure to follow the instructions posted on the website.