New computer woes - circuit breaker problems

[SUBMAN1]

So now I got all this new stuff - dual core 4400+, Visiontek x1900 XTX (Crossfire ver), 2 GB DDR 530 RAM, ASUS A8R-MVP Deluxe, yadda yadda yadda.....

Problem is, plugged in my old PSU (400 Watt Seasonic Tornado) and nadda. Wouldn't even start unless I unplugged the vid card.

So off to the store, and I pick up a Silverstone PSU with 600 watts and a peak of 710 watts and now I fixed one problem but created 2 more. Now the PSU doesn't fit in my case so I will have to get the dremmel out tonight and make some mods to the PSU holder, and the second is, it has an inrush voltage of 50 Amps @ 115 volt. Needless to say, my 15 AMP circuit breaker in the house that powers these outlets does not like that!

So my question is, how hard is it to replace circuit breakers? I am thinking I'll put a new 15 amp jobby in there, but one more tollerable and allowing for a longer response time to inrush voltage.

If anyone knows whats involved with replacing these guys, let me know.

Thanks,

-S