Collab Interest and fix your VST's
If you go into Options>Audio Settings and then drag the buffer size more to the right, you should get rid of the popping noises when running big VST's, but this may cause any MIDI devices you have to lag and have an offset while recording.
Play the song on loop on the most CPU intensive part and then open that menu, if you see underruns going up, then you need to move the buffer size more to the right. If the are stable, then try moving to the left as much as possbile without having them move.
or you can switch the top drop down menu to ASIO4ALLv2. Then click on Show ASIO Panel and adjust the buffer size accordingly.
With my comp, its better to use the second choice, everything runs smoother and not much lag.
If that doesn't help. Upgrade your CPU, lol. I got a Core 2 Quad overclocked at 3.38ghz per core and 4 gigs of ram. Never hear any poping noises, and I can run like 45 instances of Nexus, Toxic Biohazard, Vanguard, etc...
About the song, I like where its going. Not usually something I would produce, I'm more into the Psy-Trance scene. If you'd like to send me the zipped loop pachage via email, I'll work on it a bit, send it back over and then see what you can do with it. I'll be sending you a message with my email address, since I don't want to publicly post it.