Laptop to flat tv

Hello,




i have an acer aspire 5551-a laptop with an ati mobility radeon hd4250 card in it.i connected to my old tv through a vga to svideo cable also tried with vga to rgb cable .i can see the pictrure on my tv, but it can only handle 800x600@50hz or 640x480@50Hz but i dont have this option in windows 7 either in the ati controll center.even if i would download an external program to change the resolution, these programs normally do it only with the primary display, but i would like this setting on the tv, the secondary display.i tried the power strip but i was unable to set it.can you/ tell me if i ever will be able to see movies on this tv and how or should i forget about it all?thanks