Small Form Factor External PowerSupply

I have a Biostar ideq 200T, i love it. here are the specs:

iDEQ 200T, 200W PSU
P4 2.6GHz 800fsb HT
512mb Dual Channel DDR400
Radeon 9800Pro
Pioneer DVD-+RW
80Gb Maxtor 8mb

Last thing i would want is the PSU on this to pop, the specs work and run fine, all reviews of this sff use 9800pro's/ sata etc, so i dont see any problems in the immediate future, i got it mainly for lanning, I have a Enermex 350W PSU spare, would it be worth doing a minor mod to use the enermex powersupply for everday use, and when it comes to lanning i use the SFF psu, will that give the internal psu longer life? or is it just a waste of time, if the psu is gonna die its gonna die, cant delay it ??

thanks for any feedback.

 

There's not really much point in making the PSU external on that rig. You'll be fine, and the PSU will go when it's time for it to go.