I know a fair bit about putting computers together but I just got this 64bit AMD machine already made. Now I want to make it look cool and get a new case and install some new fans and LEDs.

But I dont want to mess up as it cost me a fair few quid.

Is there a good guide to doing this?

Just did a Google search for "neon PC system case" - it returned quite a lot of results. This might be of interest to you - a site with guides on "modified" PCs: http://www.gideontech.com/content/guides/

lol. thats how i got here :P

Its not just the case or anything... its mostly puttiing it all together that i think I need help with.

try www.overclockers.com it has various forums including case mods that tell you just about everything you need to know to make your system look cool