Can i use my usb flash drive as my ram for speed up my laptop as i am using windows 7?

you can do this by go to properties of your pendrive in my computer, then in ready to boost you can select the memory of your pendrive that you want to use as virtual ram. but note! this can only give a smoothness in your computer not a ram speed.

yeah you can and if you have a highspeed one meant for readyboost (if its still called that) it will actually make a pretty good difference

yes see here: http://windows.microsoft.com/en-US/windows-vista/Using-memory-in-your-storage-device-to-speed-up-your-computer

plug it in then go all the way down to speed up my system