Besy way to slowely upgrade pc?

hey. im wanting to upgrade my pc and i only get about 200 every other week and im wondering how i would go about upgrading my pc in steps, as in almost the whole pc.

the place i will be buying from is
http://www.canadacomputers.com/, so please link me to any particular parts i should buy, almost, im only wanting to spend about 100 every 2 weeks, so please keep the price near 100.

Ive already bought this:

Code:

http://www.canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=019779&cid=999.243

here are all the specs i could find on my pc

http://img243.imageshack.us/my.php?image=cpuwf3.jpg
http://img508.imageshack.us/my.php?image=displayoa7.jpg
http://img266.imageshack.us/my.php?image=mainboardho5.jpg
http://img151.imageshack.us/my.php?image=soundqi2.jpg
http://img338.imageshack.us/my.php?image=systemkm8.jpg
http://img359.imageshack.us/my.php?image=mypcuj4.jpg

so ive already got a graphic card coming in the mail, so the one in the picture is my old one.
what else should i buy, i can buy one more thing right now possibly, also im a gamer, i play counterstrike.

please serious posts only
Thank You All!!

 

I'd probably buy another gig of ram or so.

 

well yea, i mean upgrade my pc dude, like i have to start with the more important things, like a new motherboard. but i don tknow ewre to start, and have to stay in my limit

 

bumpityyyyyyyyyyyyy

 

Slowly updating means you wont ever have a top of the line computer. If you buy a brand new video card and your still running your shit old motherboard and processor, it will be a waste of time and you will have compatibility issues.

My advise, Save your money until you can buy a whole new rig, Its cheaper and you will have a top of the line computer when you have the money. Put up with it for as long as you can. If you start now, by the time you finish upgrading your computer, it will be out of date.