Basically you have answered your first question yourself already I think, apart from how you want to write it out in your template you have your DCP there.
My preference would be to use @@RenderComponentPresentation('tcm:7-1533','tcm:7-1532-32')@@
but I would actually not use it with hardcoded TCMURIs. I'd probabaly write a TBB which reads the Multimedia Component TCMURI and its Template URI somewhere from for instance a configuration Component or the Publication metadata, then your template could look something like:
@@RenderComponentPresentation(${LogoUri}, ${LogoTemplateUri})@@
When using Dreamwever TBBs for your layout, I would use this as a preference. If you are using another way of layout, then the next best thing would be to use the TCDL tag. Indeed to try and keep your templates code agnostic. The only time I would ever revert to writing out the tridion control code myself, is when I cannot get it there another way.