Vista - Few Issues: [Sony VAIO Laptop]

Hello Vistax64 I need some help with my Laptop.

First a few specs stuff:
Model: Sony VAIO VGN-N365E
-Processor: Intel(R) Core(TM) Duo CPU T2450 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s)
Display Driver?:Mobile Intel(R) 945GM Express Chipset Family
RAM: 1024.00 MB
Hard Drive: 120GB
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Now with some of the problems:

My system has recently been randomly turning aero off, but I haven't made any major change recently but it still decides to randomly shut off aero. I need to know how to fix this.

The laptop comes stock with 2x512MB of ram, and apparently from using it this long, from around July, I believe I would be better with 2GB of ram. I need to know how to do this.

Today I went to try to play the game FlyFF and it went find for about 20mins and then randomly my display driver crashed. It recover immediately, well as so Vista said, but my computer was stuck with this big white box over the screen and I had no choice but to power off manually because nothing worked. Now I need to know if there is anyway to have some shop or way of getting a new display driver or getting a better one, or one I can actually work with. I can't play any games grrr. Any help?

I believe thats it. Sorry I couldn't find that much info on it. There was specs on E/B but I have just E.

Please someone, these are very important.

Well, I also have a Sony vaio laptop (VGN-FZ11Z), but with 2GB Ram and it's working just fine on my Windows Vista x64. I think you should upgrade your ram. And about that aero switching on and off, well I think is because of the percentage of resources that are being used. My aero also turns off when I start a game that uses a lot of resources. Try disabling the aero interface until you upgrade and see if your games work a little better then. And don't ask too much from your Graphic Card, it's not for games, it's for movies and other multimedia things, but not for games. Try playing at a lower resolution.
I hope that this will help you in any way.

Err, I know that I need more RAM. The question is, How do install more RAM? I found out what type I need and have found two RAM choices on NewEgg. One 2x1GB the other is 2x2GB. So either 2GB or 4GB.

Now about the Aero. Her are a few things about my problem. Today I turned on my computer, and at startup everything was fine. The only programs running at start up were: WLM 8.5, ObjectDock, Windows Live One Care and Windows Sidebar Note Gadget. Thats not alot at all, as last night I had all that plus iTunes and Firefox and Photoshop running. Back to the startup today. I then started Firefox and all going smooth still. Then I started iTunes ... Aero turns off. There has to be some major problem if it turns off with just these few apps. I've had way more open then this before and Aero never had a problem. Now I also have only 26GB of 120GB free of hard drive space. Does low hard drive space play a role?

Please, PLEASE help me with fixing these problems. Thanks in advanced.

Well low disk space may have a role in this case because of the swap file that windows is creating on one of the partitions. You can easily get rid of this by using Windows Vista ReadyBoost. All you have to do is spend a few bucks on an 2GB flash memory that is certified for ReadyBoost and your problem with the swap file is solved because windows will use the dusk space from the flash memory which has a higher access rate. And another thing you can do is closing for good that sidebar, all it does is using ram so it's not very useful if you don't have enough...Try this at first and then if it's still turning off try the flash memory thing.
Cheers