Graphics card installation help! Where do I put this thing?!

I'm not exactly intelligent when it comes to installing hardware. I don't really get on my computer much anyway. I recently got a new computer and I was going to transfer my GeForce FX 5200 (lol i know right) to it, but I can't find a spot to insert it in to.
So I looked around in it another day and found out if I pulled out the "modem" card, where you would plug up a phone line if you were using dial-up, I could insert the card right in there. Well, I was wondering if it'll still work by doing this, and if there is any way it could damage the computer.

There's a video on this site that shows the spot:

Adding or Replacing an Expansion Card (Video Card, Sound Card, etc...)

My computer is an Intel Celeron, 2.20ghz, 2gb of RAM.

Will the instructions work on that site with nothing to worry about?

Any help is greatly appreciated!

 

What interface is your 5200? (AGP, PCIE or PCI).
I'm guessing that its using an interface that your new computer doesn't support and thats why you can't find a slot.
What kind of slots does your new computer have?

 

just looked around your card is AGPX8 (2gb/s) http://www.hardwarezone.com/img/data/articles/2002/586/agp_slot.jpg

insert into your agp slot, look for a slot like the one in the link, or if ur uncertain refer to your motherboard/pc manual.