Can I reuse a prebuilt HP PC's PSU into a custom PC?

[vZammy]

I am making a budget PC. I don't have much money to spare, however my old HP computer from around 2007 called HP Compaq DC7800 small form factor, it has a power supply called hp power supply r33567 Could I use this into my own custom build? I'm only going to use this PSU for around a month then, upgrade later. My current build is a Micro ATX case build, heres the parts exclude that PSU included in the list, because thats what I'm going to upgrade to within a month: http://pcpartpicker.com/p/WxyR23

So will my old 2007 HP PC's power supply work with that custom build?

 

[Killer MO]

I think that won't be any problem

 

[GhislainG]

If it's this 240W PSU (powerful enough), will you fit it in the case or leave it outside? http://www.saharamicro.com/-hp-compaq-437352001-dc7800-sff-240w-power-supply-437798001-ps62414hp-p-1379.html