Scat if you read what I wrote those are the basics. Nothing fancy is in there thats just basically taking a video and combining a vocal track with the videos audio and setting the audio levels. If you approach it with the “this shit is complicated” attitude then it will be difficult. The bottom line is that if you want to learn to do it its going to take some trial and error and a little time fucking around with the program. No one taught me to do it but by just messing with it and googling what I wanted to know I was able to figure it out pretty quickly.
Szuter before you go out to the store to get one I would say check ebay and also radioshack has one like the one I have.
RadioShack 4-Way Component Video Distribution Amplifier : Amplifiers | RadioShack.com
This is the one I have:

I got it on ebay for $34 used but It was in GREAT like new shape.
Tons of them on ebay for about $24-$34.
CE Labs AV400COMP items – Get great deals on items on eBay.com!