Frames
Here are some examples of different frame positions and the codes you need.

Frame Sizes
To change the frame sizes, just put a number between 1-100% , but remember no matter how many frames you have , the total of the frames size must add up to 100% .
Borders
You can add borders around your frame by putting this code ' border=0 frameborder=0' after you put your frame sizes. For example :
< frameset cols=80%,20% border=border number here frameborder=frame border number here>