problems with senao wireless + XP SP1

I have connected my laptop which is loaded with windows XP SP1 to a wireless network using senao wireless USB card and I am having the following problems
1. it can hardly connect
2. when connection is established, it disconnects after some time and I have to connect again and so on.
3. blue screens appears very often warning me and tells me to remove the last software or hardware that I have installed and in this case it is the senao card and software I guss becaus it is the last installed
4. some people told me to format and install XP SP2 which works better with senao.
I am asking if I can do something like update or add a softwre with out formating and using the same SP1