. I'm a bit dumb.
. I don't have much experience with pentiums but as far as i know they can operate up to tempretures of 75 degrees celcius
. I would give it a go. Even if you do go too high pentium 4's have a automatic downclocking thing so that if the tempreture gets too high it downclocks the CPU until it's cooled down. So then all u have to do is lower it again. I've never had a pentium processor my self but i have overclocked one. I would just search on google for a pentium 4 overclocking guide. Also have you considered getting 1GB of RAM. Cause that amount of RAM for your system looks too low. I've got that kinda RAM in my 4 year old computer
. Either get another stick of 512mb of RAM and run them in dual channel mode or get a 1GB stick. 2 x 512 in dual channel mode would be faster. Or you could even get 2GB consisting of 2x 1GB. When overclocking you can
1. Raise the FSB which makes all the things in the computer run at that speed
So your memory does as well so make sure you have at least DDR 400 RAM. You can set memory divders which make the RAM run slower the CPU and it's better to set memory divders than get really expensive overclocking RAM which runs at 300mhz or what ever.
Also you said earlier what case was that that wiggy had. Get Antec's P180 case. The best air cooled case avalible at the moment. It's also the quietest one for the air flow. So if your gettin a case deffinatly get the P180. I have one and have never regretted it.