From the readme:

What is WinXap?
This application allows you to easily add/modify menus for use with the Microsoft Dashboard. Designed for newbies, who dont want to edit manually the dashboard.

Information:
- Directory should contain WinXap.exe, Pixit.exe, WinXap.ini (remembers your last menu config), and the read me files for both WinXap and Pixit.
- All of your dashboard xips. need to be in the same folder, as well as the xbe. (For this version, it only supports named "Xboxdash.xbe")
- This application makes use of settings menu hack, so your settings area in your dashboard will be instead "Launch Menu". Backup your current Dashboard before using this in case you want to change settings at a later time.
- Currently Tested on WindowsXP with Dashboard that is xboxdashdata.1012a700. Please use an unmodified set of xip files/xboxdash. (Becuase there are many dashpatches out there, and this program "may" conflict with them).
- Currently only 1 level menus, no submenus this version.

Disclaimer:
Obviously not responsible if you fould up your dashboard. Make a backup, just in case. Follow instructions.

Credits:
Voltaic : For obvious reasons. Pixit has changed the lives of those who attempt to dashboard hack. VulgusProfanum: This individual broke some things open in the early phases, and continues to make strides.

Official Site: n/a , by [XTech]
Download: here