Right, I really don't understand these things. 
I only have standard modem slots on my pc. Now, would I be better off getting a brand new pc or would it be easy enough to install Ethernet ports onto a cpu??? i would like to get some wireless internet set up.

I only have standard modem slots on my pc. Now, would I be better off getting a brand new pc or would it be easy enough to install Ethernet ports onto a cpu??? i would like to get some wireless internet set up.