Hex values for jumps and thier functions please? VB?

Yes, I am a newbie and I am unsure of the exact terminology but the values 90, E9 and others are what I am asking about. I would like to get a table of all useable values and thier functions or explanation of proper usage guidelines. Does anyone have a link to such information or could you share your knowlege?

I am using W32dasm and a hex editor to get past registration and nag screens. I find the proper MOVs, CMPs and Jumps but I am unsure of the values to use in the offset to force the jump always. Thanks