His mobo has a 800Mhz FSB, but his CPU is likely running at 533Mhz based on the fact he is running a Celeron. In the bios he will likely have his memory clocks set to auto, but it is looking like a 4:5 ratio would be used for this memory to FSB speed.
The guys you bought it from should give you the OEM version of Vista. The computer is supposed to come with it.
http://www.overclockers.co.uk/showproduct.php?prodid=CP-159-IN Is a great cheap processor. It may only be 2.2Ghz compared to your 3.2Ghz one now, but it has 2 cores, versus the current 1. So effectively the E4300 has 2 processors running at 2.2Ghz. They do so much better at handling multiple programs running.
If I do install it, dya reckon the cd ' MSI Drivers & Utilities VIA Chipset for Windows VISTA' could boot vista back onto it or should i kick off for a proper cd?
Kick off for the proper DVD. What would happen if your system hard crashed, or you got a virus that wiped everything so you needed to reformat and reinstall? You own a legal software key, you should have the software to go with it. It is all part of the system builders license, they are supposed to give the copy of the OS that they installed on it.
And as for installing, you have to set the bios up to boot from optical drive and put the Vista dvd in and it runs the program by itself (its easier than it sounds to do)
there are rules when tampering with the bios, dan, if you have a chum or an hours worth of cash you can part with, it might be wise to get some experienced help on the scene.