help burning a playable DVD?

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Please, can anyone help?

I've tried more times than I can count...

I have videos on my hard drive that I'd like to burn to a stand-alone DVD PLAYER. I can't seem to do it.

My current project has me burning either
A) a .mov that I exported from PowerPoint
or
B) if not, then individual .wmv video clips to be played on a DVD PLAYER

Here's what I've got: iDVD 6, iMovie 6, Visual Hub, DVD Creator, MPEG Streamclip, Burn by Sourceforge, ffmpegX, mac the ripper, VLC (and I tried iVCD but it wouldn't play in the DVD player...). Running a G4 10.4, using Memorex DVD-R for my PIONEER DVD-RW DVR-105. (I previously was using Sony DVD-RWs but they never seemed to work, either...)

I'm not against buying a good piece of software if it in fact will do the job.

Help!!!

EDIT: OK, I've gotten as close as creating an ISO file and burning it to a DVD through Disk Utility. It works on my mac, but not on my DVD player, though.

 

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UPDATE:

Anyone have experience with this?

I'm beginning to think it has something to do with the DVD players themselves. I have two older Toshibas: a 5-disk, and a TV/DVD combo. Both *claim* to play DVD-R. I have suspicions.

I'll have to try on a newer DVD player.