You will need to create or open the following registry key on the client machine:
<HKLM or HKCU>\Software\Policies\VMware, Inc.\VMware VDM\Client\RDP Settings
That will be the parent key of all of the RDP settings for the client machine. HKLM overrides HKCU, which overrides each value's default.
Create a REG_SZ named "ColorDepth" set to "15"
Create a REG_SZ named "RedirectDrives" set to "false"
Here are some more values you can set in the "RDP Settings" key. I am pretty sure that every registry value can be REG_SZ, but a bool type will mean that the value data would be "true" or "false". For an integer, refer to the View Administrator Guide for the specific values (or do a google search because they map directly the values that the Microsoft RDP control uses).
Bools: "DisableWallpaper", "DisableFullWindowDrag", "DisableMenuAnimations", "EnableEnhancedGraphics", "DisableCursorShadow", "RedirectPrinters", "RedirectPorts", "RedirectSmartcards", "RedirectClipboard", "BitmapPersistence", "EnableCompression", "ShadowBitmap", "CachePersistenceActive", "RedirectPlugAndPlayDevices", "FontSmoothing", "DesktopComposition"
Integers: "AudioRedirectionMode", "KeyboardHookMode", "BitmapCacheSize", "BitmapVirtualCacheSize", "BitmapVirtualCache16BppSize", "BitmapVirtualCache24BppSize", "BitmapVirtualCache32BppSize"