The package below contains all known needed drivers for your E2 Rokr phone. It includes the last known stable pack of P2K Drivers and the drivers that are required for USBNet mode (when doing Telnet).
Download the older P2K drivers + USB Net drivers HERE
Download the new 2.6.2.0 P2K drivers set HERE

The installation is simple - when you switch the phone is some mode (modem, usb net or bootloader) then Windows will detect it and will ask you for drivers. Just unpack that archive and point it to search in the right direction.