Hello everyone

I want to drill a couple of holes behind my case to mount a fan to cool the CPU. Any good advise before i make a mess out of it?

Also, my setup is:
mercury mid-tower case
sparkle 250W PSU, 0.25mu Athlon 650Mhz
1 HD, 2 CDROM drives
1 PCI blower, 1 case fan, single CPU fan

do you think by adding an extra fan will put too much streess on my PSU? Whats the maximum you think a 250W PSU can stand? Would it blow up if overloaded?

Thanks in advance for any advise !!!