how to use lava 730g usb modem

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http://askubuntu.com – any one i have just installed ubuntu 12.04.1 on my lenovo z 580 laptop and i have a lava 730g usb moden which i used to connect to internet on windows 7 .. i want to know how to use this modem on ubuntu in its driver folder there is a folder for windows,mac and ubuntu drivers and ubuntu folder contain a tar file and .sh file what should i do (HowTos)