The default Windows Mobile 6.5 coming on the HTC HD2 sports a three row display type of icons in the Start Menu. There’s a small hack that replaces the cpr files in your Device which will edit the display of the Start Menu to four or five columns.
The hack not only adds one or two more columns, but it also resizes the application icons and recenters the text labels below them. It can be used on the HTC HD2 but the hack can be applied to other devices running Windows Mobile 6.5 and having a WVGA display (but if you’re on another device or a custom ROM, check the registry for the existence of HKLMSecurityShellStartMenuCustomGridForm = “StartMenuCust”).
See attached screenshots and go for the one of you liking. Download and install the chosen one, soft reset your device and you’ll have the new Start Menu grid. If you want to revert, uninstalling should get back your stock Start Menu as the original files are ROM files and thus always restored.
(Source: XDA Developers)