Here's a link to a video tutorial I came across on the Cakewalk Blog that has been immensely helpful to me:
<a href="https://www.youtube.com/watch?v=ovre1jS-I0A">Digital Sound Factory Z3TA2 Sound Design</a>
The tutorial uses Z3ta 2, but the principles are the same. It's helpful to know how to use LFOs and the modulation matrix so you can get specific effects (such as the dubstep wobble that is described very well in the Maartian's post) with different programs (I'll often add vibrato effects to existing programs using the mod matrix and LFOs). Cryophonik's program is very nice, and it might work well in your scenario, but it's nice to know how to apply the same effects to other programs, so you can preserve the awesome sounds found in Z3ta's presets while only changing the wobble effect. A disclaimer, though, is that a lot of the Z3ta presets come with LFOs, filters, and mod matrix programming already assigned, so you have to try and avoid LFOs and filters that are currently in use, otherwise you might alter the sound of the program to a point where it's no longer desirable to you. If you find a bass sound in Z3ta that you want to add a wobble to, I could try and alter the program for you could automate the LFO sync to different durations. My general strategy in doing this (depends on the complexity of the program, though) is:
1. Find an LFO that isn't being used already (the light next to the number won't be lit), select a waveform next to the Wave1 field (sine is usually fine)
2. Find a Filter (1 or 2) that isn't being used and set the type to low pass filter (LPF). One or both are probably being used in the program already, so this is the step that can really change how your program sounds overall. If both are being used, I'd probably go with one that is already using a LPF.
3. Find an unused slot in the modulation matrix, assign the source to whichever LFO you used in step 1, set the range all the way up, then set the output to the filter-filter cutoff that you chose in step 2.
4. While playing a note, or previewing a bassline, mess with the speed for the LFO you chose in step 1. If the effect sounds right, you can set the LFO's sync to some value, then automate that value in the automation lanes. If you prefer the manual mod wheel feel, set the control in the mod matrix to "Mod Wheel" so you can adjust the speed of the LFO with the mod wheel.
5. If the effect doesn't sound right in step 4, you might need to change the routing of the oscillators to the filters. Each oscillator can be routed to either filter, or a mix of both, so to get the most of the bass wobble effect, it's probably best to route each oscillator to the filter you're using, that way every component of the sound is being filtered rhythmically by the LFO.
Hope that helps. It probably sounds like a lot of mumbo jumbo if you're not familiar with poking around in Z3ta, but watching that video will help a lot, I swear. If you watch the portions in the video about adding vibrato with the mod matrix, then re-read the steps above, it should hopefully make sense.