I did around 3 takes each for the rhythm and lead parts, so near-perfection is out of the question here.
It took me about 2~3 hours of fiddling with Sony Vegas Pro before I finally figured out how to get the stupid split-screen thingy to work.
And another 5~6 hours to upload the friggin video, courtesy of Malaysia's "faster-than-a-speeding-snail" broadband speed.
At the end of the day, I think that I'm quite pleased with the results, if you guys don't mind me saying so.
So, anyways here's the video open to your scrutiny.