Add a solution to the solution store

To do this, you need to use an stsadm command.  Open a command prompt and run as administrator.  The following line should work:

"C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN\stsadm" -o addsolution -filename "path and name of .wsp file go here"

The solution can then be deployed using Central Administration.

Add Shortcut to Send To Menu

In Windows 7 or Windows Server 2008 R2, just copy a shortcut here:  %APPDATA%\Microsoft\Windows\SendTo