Eagle library component

Sounds very interesting, as well as the prices they have. Of course, I do have too little kids around me and it's..quite dangerous working with chemicals.

This is for the upcoming boards. But for now, once I've started this way, I just should finish the board manually.

I still have some questions:
-is this way of fabricating the PCB's, the exposure to UV light, cheap or expensive?
-I have this header pins for the board, the only way of making the traces is using the double-sided PCB and the problem is that when I try to automatically route the traces, the software doesn't ,,know" that on the top on the board there are headers. This thing makes the soldering impossible. In theory, I should melt the headers to solder something, but that's unlikely to happen. How can I fix this situation?

Thank you,
RobertEagle