I come with hat in hand in need of computer advice again....

So I continue to find a need for a serial port on my laptop. USB to RS232 adapters kinda sorta work, sometimes... I was expressing my frustrations with this to a friend and he told me "Just get an express card serial adapter". I did a search on the net and found out this isn't as easy as just buying one and installing one. After looking at the things, I have no idea how to begin to install one. There does not appear to be any sort of knockouts on my laptop case and there's nothing to slide any sort of card into the side of the damn thing.

Can someone give me the high level on how to go about installing one of these things and what I should look for??

My laptop is a Toshiba Satelite L305s5921. I just use this laptop for calibrating my displays and tuning my vehicles. It has Vista on it now, but I intend to upgrade it to Windows 7.

Here's my laptop....

http://www.newegg.com/Product/Product.aspx?Item=N82E16834114611

thankyouthankyouthankyou...