You cannot find the WebObjects Deployment CD in Xserve's accessories.
Solution
The WebObjects Deployment software is located on the Mac OS X Server CD. There is not a separate WebObjects Deployment CD in the Xserve bundle.
To reinstall WebObjects Deployment, double-click WebObjects X Deployment.mpkg.
WebObjects X Deployment.mpkg is located in the WebObjects 5.1 Deployment folder within the Additional Installs folder. See figure 1.
Figure 1 WebObjects X Deployment.mpkg location on the Mac OS X Server CD
If you are remotely installing the path is:
/Volumes/Mac\\ OS\\ X\\ Server/Welcome\\ to\\ Mac\\ OS\\ X\\ Server/Additional\\ Installs/WebObjects\\ 5.1\\ Deployment/WebObjects_X_Deployment.mpkg.