I don't think that 3D Acceleration is disabled on the 600X, but none of the 600/770 series implement a DirectX-certified or Microsoft-certified version of 3D acceleration on their built-in video adapters.
I don't know about FIFA 2002, but I know that it is pretty hit or miss whether the NeoMagic chipset will run with any particular game requiring 3D acceleration. Some will work, some won't, and that's all there is to it.
One solution for playing 3D games on your 600X is to buy a docking station and then insert a PCI graphics card into your docking station. There is no other way to add a full graphics card to your 600X as far as I know. There are PCMCIA hardware accelerators, but I've not seen one that is a complete replacement for your built-in video card adapter.
There are at least two negatives to using a docking station like this. First, your laptop will start to take up a huge footprint on your desktop -- more like a Bigfoot pawprint than a footprint. Second, even after you get yourself a docking station and card, and play with it for several hours to get it installed correctly and working at optimum capactity, you will still only end up with a pretty low-end gaming machine by today's standards -- you could probably buy an entire desktop system for $300 USD or so that would play games better than your 600X stuck in a docking station.
Having said all that, if you are still determined to turn your 600X into a gaming machine, then I would recommend the following setup:
ThinkPad 600X
ThinkPad SelectaDock III ($20 USD)
ThinkPad Selectabase 600 ($15 USD)
19" or larger external CRT monitor ($250 USD)
64MB Voodoo 5 PCI graphics adapter ($50 USD)
SoundBlaster 5.1 Live! PCI sound card ($20 USD)
This is one of my ThinkPad setups and it plays a range of 3D games reasonably well -- at least if you like the 3D games from the 2001 era or before and if you can live without playing any of the new games that require hardware support for "T & L" (Texture and Lighting). I'm planning on doing some benchmarking some time over the next 6 months or so and will post results to this forum somewhere if I ever get that done.
Everything except the Voodoo 5 card should be readily available and pretty cheap on eBay or through some kind of computer liquidator. The biggest cost will be getting a good, large external monitor, but maybe you already have one of those sitting around? The ThinkPad Selectabase 600 is required to attach your 600X to the SelectaDock. I've put estimated street values in parentheses.
You could substitute a 32MB nVidia TNT2 card for about $15 or $20 USD in place of the more expensive Voodoo 5 and probably not notice much difference in speed or compatibility. Though I found the nVidia cards slightly less stable than the Voodoo cards in a SelectaDock III.
I've created a compatibility list of PCI graphics cards that you can install in the SelectaDock III:
ThinkPad - Dock III - Unofficial Graphics Card Compatibility List
Good luck gaming!
Phil.