There are 3 common methods for installation of ipk files (E2 plugin)
1. Telnet Methods
a. Connect your E2 device with Putty or DCC.
b. Go to FTP and copy one of this plugin on /tmp/ folder.
c. Go to Telnet and Copy and paste one of this command.
opkg install /tmp/XtreamTV_0.0.1_armv7a.ipk