Appreciate the help! Using the TCP/IP optimizer (I just clicked the best performance or optimal setting button since I don't know what each setting means) brought by P2P back up to high speeds! It must have opened up the approporiate ports that sp2 closed up. And downloading from sites is still high speed as always.
However, web browsing is still slow...

Can you give me the settings I can input manually to bring web browsing speed back up too?
PS: SP2 was integrated into my Windows XP, so I don't think I can get rid of it.