Help! Am I killing my computer with hard reboots?

I own a 3 year old macbook pro which had been working perfectly fine up until recently, and unfortunately there is no mac support anywhere close to me so I'm sort of freaking out about my computer maybe dying.

A couple weeks ago it started randomly freezing and not allowing me to do anything at all except but hard reboot it when it did, I was able to move my cursor around but the computer was completely unresponsive. I didnt really think much of it since it would happen when i was running certain applications like flash or some games, until it started doing it at random and more often, even when i wasnt even using any of those applications. Could this be due to the whole hard rebooting thing?

Ive also had my screen just randomly go black and not respond unless i hard rebooted, and once or twice had it just freeze and then start fading into a light blue screen. What does this mean??

I was looking at some forums that basically said that macs dont crash unless its related to memory space, bad hardware or permits, so why is my mac crashing so much? I switched my store 512 ram for 2gb ram but that was almost a year ago and i never had any issues until now, I also updated all my software, ran disk utilities and repaired any unbroken permits, and freed as much as i could of my hard drive, so I dont know whats going on, if anyone could help me out I would really appreciate it.

Someone said to me it might be about the computers temperature just getting way to high, and I have felt it get really hot but what I dont know is how hot is too hot? I downloaded the istat nano widget to check out the temperatures my computer is running at but to be honest I have no idea what any of these mean, and I tried searching around for standard macbook pro temperatures but haven't really found anything too helpful on the internet. Does anyone know what kind of temperatures macbook pros should be running at? I would really appreciate it.

According to istat nano these are the temperatures my computer is running at when using applications such as flash:

Hd: 42c
Cpu A: 68c
Gpu: 60c
Gpu Heatsink: 65c
Heatsink A: 45c
Heatsink B: 44c

My fans were also running at around 4000 rpm... Are these numbers normal??

Anyway, if you guys could recommend anything that might help me out without having to take the long trip to be able to find a mac support store I would really appreciate it. Another thing is that it doesnt always crash, sometimes it can go for a couple of days not crashing at all and then one day just crash over and over and over again. Im scared that those constant hard reboots may be killing my computer so please help me! Any comments or advice are greatly appreciated.

 

These are my computer's specs:

Model Name: MacBook Pro 15"
Model Identifier: MacBookPro1,1
Processor Name: Intel Core Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache (per processor): 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP11.0055.B08
SMC Version: 1.2f10
Sudden Motion Sensor:
State: Enabled

And my video card is a ATI Radeon X1600

 

ok i will try these things and see if that helps any, thanks a lot for your responses

 

so i ran disk utility verify disk and i got this error

"The volume Macintosh HD needs to be repaired.

Error: The underlying task reported failure on exit


1 HFS volume checked
Volume needs repair"

I cant use the repair disk tool because its not finishing up so it wont even light up, anyone know how to fix this??

 

oh lame alright well thanks a lot for your help