How to install Custom roms on HTC

1.Download any one custom rom....
2.Copy the zip file in your phone sd card( dont extract jus copy the zip file)
3.Boot your phone in CWM ( when switch on you phone press power and volume down button)
4.IN CWM mode
    wipe data(reset factory)
    wipe cache
    dalvik chache
    dalvik battery status

    mount n system
    format data
    format system
    format cache

5. Now choose Install zip from SD card

6.Wait till it flash 

7.Once done reboot your device and you are done

Here is link for few custom roms for you

CustomROms

else Search in google