No, you see, you get this ending by ignoring the space pirate threat, by having Samus immediately return to her ship and reporting an "all clear". :D The galaxy is doomed!
And yeah, it is surprising what you can accomplish with Paint if you put your mind to it...
well since you can manipulate individual pixels in paint than you can do anything that you could in photoshop(except animations) but it could literally take thousands of times longer.
Hey, here's a question - how much space does Metroid Prime reserve in memory for storing the amount of time used, or how does it generate the time? Because I know that, when programming anyway, if you have a value that's too large, it will do some strange things, that could, in theory maybe, be exploited if you had millenia to wait to generate a time like that, and then you wouldn't even have to bother going to the trouble of using Paint to draw that - just get to right before Prime, take some Nyquil, wake up millenia later, and finish with a negative time :)