I tried to do the same , I looked around all the place and tried to print the form in A4 size paper, Lucky for me I could print the form in A4 size paper( Compared the paper by my self), I sent it to the embassy , after the week and a half I got the package back from the Embassy saying the form was not in A4. I called the embassy( after several calls they finally picked up the phone) I told them the problem, they said the form was not in A4, I argued with them for some time, but after sometime I gave up and just asked them to sent the form to my address and I sent the return addressed envelop to them, got forms in 1 weeks time, sent everything back and now the passport is in process to Nepal.

I am not telling you you can't print in A4 by yourself, just sharing your experience.