OK! I've been making good progress. My synthesizer was damaged in the move a few years ago and will not retain anything in memory when it is shut off and I have to go through several steps to get it reset and working. So I have written these instructions and pasted them to the keyboard. This will save me a lot of time since I have been basically re-figuring it out every time I use it.
I have also mapped all of the drum note assignments in my Alesis drum machine to match standard midi mapping. This way I can take drum riffs from the internet and play them directly through my computer to the Alesis and hear what they sound like.
For "Looks Like Rain" I added a bass track and some piano in the bridge sections. I've been playing with a percussion track but don't want just straight drumming. I'm fooling around with the congas, timbale, maracas, shakers, wood blocks, tambourine, and claves. I'm going to add a little triangle to the bridge. It's sounding quite nice but it is hard to program the drums to sound realistic.
I still haven't recorded demo versions (just guitar/vocal) for the 3 songs that I don't have any record of. I will be recording tomorrow night and I'll take a break from the percussion and just lay down these tunes live with me and the guitar.